diff --git a/src/client/users.go b/src/client/users.go
index eb5de39..ac978b2 100644
--- a/src/client/users.go
+++ b/src/client/users.go
@@ -11,24 +11,24 @@ import (
 	"github.com/parnurzeal/gorequest"
 )
 
-type SingleUserClient struct {
+type UsersClient struct {
 	addr string
 	r    *gorequest.SuperAgent
 }
 
-func NewSingleUserClient(addr string) *SingleUserClient {
+func NewUsersClient(addr string) *UsersClient {
 	gr := gorequest.New()
-	return &SingleUserClient{
+	return &UsersClient{
 		addr: addr,
 		r:    gr,
 	}
 }
 
-func (cl *SingleUserClient) url(urlpath string) string {
+func (cl *UsersClient) url(urlpath string) string {
 	return fmt.Sprintf("%s%s", cl.addr, urlpath)
 }
 
-func (cl *SingleUserClient) Login(user, pwd string) (*http.Response, string, []error) {
+func (cl *UsersClient) Login(user, pwd string) (*http.Response, string, []error) {
 	return cl.r.Post(cl.url("/v1/users/login")).
 		Send(multiusers.LoginReq{
 			User: user,
@@ -37,13 +37,13 @@ func (cl *SingleUserClient) Login(user, pwd string) (*http.Response, string, []e
 		End()
 }
 
-func (cl *SingleUserClient) Logout(token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) Logout(token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Post(cl.url("/v1/users/logout")).
 		AddCookie(token).
 		End()
 }
 
-func (cl *SingleUserClient) SetPwd(oldPwd, newPwd string, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) SetPwd(oldPwd, newPwd string, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Patch(cl.url("/v1/users/pwd")).
 		Send(multiusers.SetPwdReq{
 			OldPwd: oldPwd,
@@ -53,7 +53,7 @@ func (cl *SingleUserClient) SetPwd(oldPwd, newPwd string, token *http.Cookie) (*
 		End()
 }
 
-func (cl *SingleUserClient) ForceSetPwd(userID, newPwd string, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) ForceSetPwd(userID, newPwd string, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Patch(cl.url("/v1/users/pwd/force-set")).
 		Send(multiusers.ForceSetPwdReq{
 			ID:     userID,
@@ -63,7 +63,7 @@ func (cl *SingleUserClient) ForceSetPwd(userID, newPwd string, token *http.Cooki
 		End()
 }
 
-func (cl *SingleUserClient) SetUser(ID uint64, role string, quota *db.Quota, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) SetUser(ID uint64, role string, quota *db.Quota, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Patch(cl.url("/v1/users/")).
 		Send(multiusers.SetUserReq{
 			ID:    ID,
@@ -74,7 +74,7 @@ func (cl *SingleUserClient) SetUser(ID uint64, role string, quota *db.Quota, tok
 		End()
 }
 
-func (cl *SingleUserClient) AddUser(name, pwd, role string, token *http.Cookie) (*http.Response, *multiusers.AddUserResp, []error) {
+func (cl *UsersClient) AddUser(name, pwd, role string, token *http.Cookie) (*http.Response, *multiusers.AddUserResp, []error) {
 	resp, body, errs := cl.r.Post(cl.url("/v1/users/")).
 		AddCookie(token).
 		Send(multiusers.AddUserReq{
@@ -97,14 +97,14 @@ func (cl *SingleUserClient) AddUser(name, pwd, role string, token *http.Cookie)
 	return resp, auResp, errs
 }
 
-func (cl *SingleUserClient) DelUser(id string, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) DelUser(id string, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Delete(cl.url("/v1/users/")).
 		AddCookie(token).
 		Param(handlers.UserIDParam, id).
 		End()
 }
 
-func (cl *SingleUserClient) ListUsers(token *http.Cookie) (*http.Response, *multiusers.ListUsersResp, []error) {
+func (cl *UsersClient) ListUsers(token *http.Cookie) (*http.Response, *multiusers.ListUsersResp, []error) {
 	resp, body, errs := cl.r.Get(cl.url("/v1/users/list")).
 		AddCookie(token).
 		End()
@@ -121,7 +121,7 @@ func (cl *SingleUserClient) ListUsers(token *http.Cookie) (*http.Response, *mult
 	return resp, lsResp, errs
 }
 
-func (cl *SingleUserClient) AddRole(role string, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) AddRole(role string, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Post(cl.url("/v1/roles/")).
 		AddCookie(token).
 		Send(multiusers.AddRoleReq{
@@ -130,7 +130,7 @@ func (cl *SingleUserClient) AddRole(role string, token *http.Cookie) (*http.Resp
 		End()
 }
 
-func (cl *SingleUserClient) DelRole(role string, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) DelRole(role string, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Delete(cl.url("/v1/roles/")).
 		AddCookie(token).
 		Send(multiusers.DelRoleReq{
@@ -139,7 +139,7 @@ func (cl *SingleUserClient) DelRole(role string, token *http.Cookie) (*http.Resp
 		End()
 }
 
-func (cl *SingleUserClient) ListRoles(token *http.Cookie) (*http.Response, *multiusers.ListRolesResp, []error) {
+func (cl *UsersClient) ListRoles(token *http.Cookie) (*http.Response, *multiusers.ListRolesResp, []error) {
 	resp, body, errs := cl.r.Get(cl.url("/v1/roles/list")).
 		AddCookie(token).
 		End()
@@ -156,7 +156,7 @@ func (cl *SingleUserClient) ListRoles(token *http.Cookie) (*http.Response, *mult
 	return resp, lsResp, errs
 }
 
-func (cl *SingleUserClient) Self(token *http.Cookie) (*http.Response, *multiusers.SelfResp, []error) {
+func (cl *UsersClient) Self(token *http.Cookie) (*http.Response, *multiusers.SelfResp, []error) {
 	resp, body, errs := cl.r.Get(cl.url("/v1/users/self")).
 		AddCookie(token).
 		End()
@@ -173,7 +173,7 @@ func (cl *SingleUserClient) Self(token *http.Cookie) (*http.Response, *multiuser
 	return resp, selfResp, errs
 }
 
-func (cl *SingleUserClient) SetPreferences(prefers *db.Preferences, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) SetPreferences(prefers *db.Preferences, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Patch(cl.url("/v1/users/preferences")).
 		Send(multiusers.SetPreferencesReq{
 			Preferences: prefers,
@@ -182,13 +182,13 @@ func (cl *SingleUserClient) SetPreferences(prefers *db.Preferences, token *http.
 		End()
 }
 
-func (cl *SingleUserClient) IsAuthed(token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) IsAuthed(token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Get(cl.url("/v1/users/isauthed")).
 		AddCookie(token).
 		End()
 }
 
-func (cl *SingleUserClient) ResetUsedSpace(userID uint64, token *http.Cookie) (*http.Response, string, []error) {
+func (cl *UsersClient) ResetUsedSpace(userID uint64, token *http.Cookie) (*http.Response, string, []error) {
 	return cl.r.Put(cl.url("/v1/users/used-space")).
 		Send(multiusers.ResetUsedSpaceReq{
 			UserID: userID,
diff --git a/src/client/web/src/client/index.ts b/src/client/web/src/client/index.ts
index f387b21..0ad07fd 100644
--- a/src/client/web/src/client/index.ts
+++ b/src/client/web/src/client/index.ts
@@ -164,6 +164,7 @@ export interface IFilesClient {
   generateHash: (filePath: string) => Promise<Response>;
   download: (url: string) => Promise<Response>;
   search: (keywords: string[]) => Promise<Response<SearchItemsResp>>;
+  reindex: () => Promise<Response>;
 }
 
 export interface ISettingsClient {
diff --git a/src/client/web/src/components/pane_admin.tsx b/src/client/web/src/components/pane_admin.tsx
index f6498a2..eb1b775 100644
--- a/src/client/web/src/components/pane_admin.tsx
+++ b/src/client/web/src/components/pane_admin.tsx
@@ -268,6 +268,20 @@ export class UserForm extends React.Component<
 
           <div className="hr"></div>
 
+          <div>
+            <Flexbox
+              children={List([
+                <span>{this.props.msg.pkg.get("action.reindex.desc")}</span>,
+                <button className="button-default" onClick={resetUsedSpace}>
+                  {this.props.msg.pkg.get("action.reindex")}
+                </button>,
+              ])}
+              childrenStyles={List([{}, { justifyContent: "flex-end" }])}
+            />
+          </div>
+
+          <div className="hr"></div>
+
           <Flexbox
             className="margin-t-m"
             children={List([
@@ -491,6 +505,10 @@ export class AdminPane extends React.Component<Props, State, {}> {
     }
   };
 
+  reindex = async () => {
+    return updater().reindex();
+  }
+
   addUser = async () => {
     if (this.state.newUserPwd1 !== this.state.newUserPwd2) {
       Env().alertMsg(this.props.msg.pkg.get("settings.pwd.notSame"));
diff --git a/src/client/web/src/components/state_updater.ts b/src/client/web/src/components/state_updater.ts
index 1554e7d..4f348de 100644
--- a/src/client/web/src/components/state_updater.ts
+++ b/src/client/web/src/components/state_updater.ts
@@ -1034,6 +1034,11 @@ export class Updater {
     return "";
   };
 
+  reindex = async (): Promise<string> => {
+    const resp = await this.filesClient.reindex();
+    return resp.status === 200 ? "" : errServer;
+  }
+
   hasResult = (): boolean => {
     return this.props.filesInfo.searchResults.size > 0;
   };
diff --git a/src/client/web/src/i18n/en_US.ts b/src/client/web/src/i18n/en_US.ts
index 65e328a..a5ef387 100644
--- a/src/client/web/src/i18n/en_US.ts
+++ b/src/client/web/src/i18n/en_US.ts
@@ -158,5 +158,7 @@ export const msgs: Map<string, string> = Map({
   "term.results": "Results",
   "term.noResult": "No result found",
   "action.go": "Go",
-  "hint.keywords": "Please input keyword(s), separated by spaces"
+  "hint.keywords": "Please input keyword(s), separated by spaces",
+  "action.reindex": "Reindex",
+  "action.reindex.desc": "Reconstruct the searching index",
 });
diff --git a/src/client/web/src/i18n/zh_CN.ts b/src/client/web/src/i18n/zh_CN.ts
index 0f5c8ef..f06976e 100644
--- a/src/client/web/src/i18n/zh_CN.ts
+++ b/src/client/web/src/i18n/zh_CN.ts
@@ -155,5 +155,7 @@ export const msgs: Map<string, string> = Map({
   "term.results": "结果",
   "term.noResult": "未找到结果",
   "action.go": "前往",
-  "hint.keywords": "请输入关键字，以空格分隔"
+  "hint.keywords": "请输入关键字，以空格分隔",
+  "action.reindex": "重新索引",
+  "action.reindex.desc": "重新建立搜索索引",
 });
diff --git a/src/server/server_concurrency_test.go b/src/server/server_concurrency_test.go
index cf99f9b..fa3b984 100644
--- a/src/server/server_concurrency_test.go
+++ b/src/server/server_concurrency_test.go
@@ -48,7 +48,7 @@ func TestConcurrency(t *testing.T) {
 		t.Fatal("fail to start server")
 	}
 
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	resp, _, errs := usersCl.Login(adminName, adminPwd)
 	if len(errs) > 0 {
 		t.Fatal(errs)
@@ -67,7 +67,7 @@ func TestConcurrency(t *testing.T) {
 
 	filesCount := 10
 	mockClient := func(name, pwd string, wg *sync.WaitGroup) {
-		usersCl := client.NewSingleUserClient(addr)
+		usersCl := client.NewUsersClient(addr)
 		resp, _, errs := usersCl.Login(name, pwd)
 		if len(errs) > 0 {
 			t.Fatal(errs)
diff --git a/src/server/server_files_test.go b/src/server/server_files_test.go
index b5a5f3e..eddab5a 100644
--- a/src/server/server_files_test.go
+++ b/src/server/server_files_test.go
@@ -62,7 +62,7 @@ func TestFileHandlers(t *testing.T) {
 		t.Fatal("fail to start server")
 	}
 
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	resp, _, errs := usersCl.Login(adminName, adminPwd)
 	if len(errs) > 0 {
 		t.Fatal(errs)
@@ -405,7 +405,7 @@ func TestFileHandlers(t *testing.T) {
 			}
 		}
 
-		userUsersCl := client.NewSingleUserClient(addr)
+		userUsersCl := client.NewUsersClient(addr)
 		resp, _, errs := userUsersCl.Login("demo", "Quicksh@re")
 		if len(errs) > 0 {
 			t.Fatal(errs)
@@ -918,6 +918,19 @@ func TestFileHandlers(t *testing.T) {
 			t.Fatal("search result not match")
 		}
 
+		userFilesClient, err := loginFilesClient(addr, "demo", "Quicksh@re")
+		if err != nil {
+			t.Fatal(err)
+		}
+		resp, searchItemsResp, errs = userFilesClient.SearchItems(keywords)
+		if len(errs) > 0 {
+			t.Fatal(errs)
+		} else if resp.StatusCode != 200 {
+			t.Fatal(resp.StatusCode)
+		} else if len(searchItemsResp.Results) > 0 {
+			t.Fatal("shoud return empty results")
+		}
+
 		// delete paths
 		for pathname := range toDelete {
 			resp, _, errs := cl.Delete(pathname)
diff --git a/src/server/server_permission_test.go b/src/server/server_permission_test.go
index e89cf93..f4b5956 100644
--- a/src/server/server_permission_test.go
+++ b/src/server/server_permission_test.go
@@ -114,7 +114,7 @@ func TestPermissions(t *testing.T) {
 			tmpAdmin, tmpAdminPwd := "tmpAdmin", "1234"
 			tmpNewRole := "tmpNewRole"
 
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 			if requireAuth {
 				resp, _, errs := cl.Login(user, pwd)
@@ -290,7 +290,7 @@ func TestPermissions(t *testing.T) {
 			// Mkdir
 			// Move
 
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 
 			if requireAuth {
@@ -381,7 +381,7 @@ func TestPermissions(t *testing.T) {
 		})
 
 		uploadSample := func() {
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 
 			resp, _, errs := cl.Login("user2", "1234")
@@ -411,7 +411,7 @@ func TestPermissions(t *testing.T) {
 			// GenerateHash
 			// Search
 
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 			if requireAuth {
 				resp, _, errs := cl.Login(user, pwd)
@@ -575,7 +575,7 @@ func TestPermissions(t *testing.T) {
 
 		// sharing permission tests
 		enableSharing := func() {
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 
 			resp, _, errs := cl.Login("share", "1234")
@@ -631,7 +631,7 @@ func TestPermissions(t *testing.T) {
 			// ListSharingIDs
 			// GetSharingDir
 
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 			homePath := "/"
 			desc := user
@@ -727,7 +727,7 @@ func TestPermissions(t *testing.T) {
 			// SetClientCfg
 			// ReportErrors
 
-			cl := client.NewSingleUserClient(addr)
+			cl := client.NewUsersClient(addr)
 			token := &http.Cookie{}
 			desc := user
 			errReports := &settings.ClientErrorReports{
diff --git a/src/server/server_settings_test.go b/src/server/server_settings_test.go
index 590b84a..086b27f 100644
--- a/src/server/server_settings_test.go
+++ b/src/server/server_settings_test.go
@@ -62,7 +62,7 @@ func TestSettingsHandlers(t *testing.T) {
 		t.Fatal("fail to start server")
 	}
 
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	resp, _, errs := usersCl.Login(adminName, adminPwd)
 	if len(errs) > 0 {
 		t.Fatal(errs)
diff --git a/src/server/server_space_limit_test.go b/src/server/server_space_limit_test.go
index 85f9b68..11d24a1 100644
--- a/src/server/server_space_limit_test.go
+++ b/src/server/server_space_limit_test.go
@@ -63,7 +63,7 @@ func TestSpaceLimit(t *testing.T) {
 		t.Fatal("fail to start server")
 	}
 
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	resp, _, errs := usersCl.Login(adminName, adminPwd)
 	if len(errs) > 0 {
 		t.Fatal(errs)
@@ -100,7 +100,7 @@ func TestSpaceLimit(t *testing.T) {
 	}
 
 	t.Run("test space limiting: Upload", func(t *testing.T) {
-		usersCl := client.NewSingleUserClient(addr)
+		usersCl := client.NewUsersClient(addr)
 		resp, _, errs := usersCl.Login(getUserName(0), userPwd)
 		if len(errs) > 0 {
 			t.Fatal(errs)
@@ -230,7 +230,7 @@ func TestSpaceLimit(t *testing.T) {
 	})
 
 	t.Run("ResetUsedSpace", func(t *testing.T) {
-		usersCl := client.NewSingleUserClient(addr)
+		usersCl := client.NewUsersClient(addr)
 		resp, _, errs := usersCl.Login("test", "test")
 		if len(errs) > 0 {
 			t.Fatal(errs)
diff --git a/src/server/server_users_test.go b/src/server/server_users_test.go
index ab9ae1a..0c22a32 100644
--- a/src/server/server_users_test.go
+++ b/src/server/server_users_test.go
@@ -72,7 +72,7 @@ func TestUsersHandlers(t *testing.T) {
 	defer srv.Shutdown()
 	fs := srv.depsFS()
 
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	settingsCl := client.NewSettingsClient(addr)
 
 	if !isServerReady(addr) {
@@ -82,7 +82,7 @@ func TestUsersHandlers(t *testing.T) {
 	var err error
 
 	t.Run("test inited users", func(t *testing.T) {
-		usersCl := client.NewSingleUserClient(addr)
+		usersCl := client.NewUsersClient(addr)
 		resp, _, errs := usersCl.Login(adminName, adminPwd)
 		if len(errs) > 0 {
 			t.Fatal(errs)
@@ -164,7 +164,7 @@ func TestUsersHandlers(t *testing.T) {
 		}
 
 		for _, user := range users {
-			usersCl := client.NewSingleUserClient(addr)
+			usersCl := client.NewUsersClient(addr)
 			resp, _, errs := usersCl.Login(user.Name, user.Pwd)
 			if len(errs) > 0 {
 				t.Fatal(errs)
@@ -451,7 +451,7 @@ func TestUsersHandlers(t *testing.T) {
 	})
 
 	t.Run("Login, SetPreferences, Self, Logout", func(t *testing.T) {
-		usersCl := client.NewSingleUserClient(addr)
+		usersCl := client.NewUsersClient(addr)
 		resp, _, errs := usersCl.Login(adminName, adminNewPwd)
 		if len(errs) > 0 {
 			t.Fatal(errs)
diff --git a/src/server/test_helpers.go b/src/server/test_helpers.go
index f0c788a..e0d5e2e 100644
--- a/src/server/test_helpers.go
+++ b/src/server/test_helpers.go
@@ -2,6 +2,7 @@ package server
 
 import (
 	"encoding/base64"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"math/rand"
@@ -16,6 +17,7 @@ import (
 	"github.com/ihexxa/quickshare/src/client"
 	"github.com/ihexxa/quickshare/src/db"
 	fspkg "github.com/ihexxa/quickshare/src/fs"
+	q "github.com/ihexxa/quickshare/src/handlers"
 )
 
 func startTestServer(config string) *Server {
@@ -57,7 +59,7 @@ func getUserName(id int) string {
 }
 
 func addUsers(t *testing.T, addr, userPwd string, userCount int, adminToken *http.Cookie) map[string]string {
-	usersCl := client.NewSingleUserClient(addr)
+	usersCl := client.NewUsersClient(addr)
 	users := map[string]string{}
 	for i := range make([]int, userCount) {
 		userName := getUserName(i)
@@ -220,3 +222,25 @@ func assertResp(t *testing.T, resp *http.Response, errs []error, expectedCode in
 		t.Fatal(desc, resp.StatusCode, expectedCode)
 	}
 }
+
+func joinErrs(errs []error) error {
+	msgs := []string{}
+	for _, err := range errs {
+		msgs = append(msgs, err.Error())
+	}
+
+	return errors.New(strings.Join(msgs, ","))
+}
+
+func loginFilesClient(addr, user, pwd string) (*client.FilesClient, error) {
+	usersCl := client.NewUsersClient(addr)
+	resp, _, errs := usersCl.Login(user, pwd)
+	if len(errs) > 0 {
+		return nil, joinErrs(errs)
+	} else if resp.StatusCode != 200 {
+		return nil, fmt.Errorf("unexpected code(%d)", resp.StatusCode)
+	}
+
+	token := client.GetCookie(resp.Cookies(), q.TokenCookie)
+	return client.NewFilesClient(addr, token), nil
+}
diff --git a/src/server/testdata/test_quickshare.db b/src/server/testdata/test_quickshare.db
index 7a66137..9a9bcd3 100644
Binary files a/src/server/testdata/test_quickshare.db and b/src/server/testdata/test_quickshare.db differ