diff --git a/internal/service/task.go b/internal/service/task.go
index 8202584..b370a1a 100644
--- a/internal/service/task.go
+++ b/internal/service/task.go
@@ -429,6 +429,21 @@ func (s *TaskService) executeOnDevice(task *models.Task, did string) {
         s.updateDeviceStatus(task.ID, did, models.TaskSuccess, 1.0, "")
         s.appendAuditLog(task, did, models.TaskSuccess, "")
 
+    case "time_sync":
+        nowMS := time.Now().UnixMilli()
+        body, _ := json.Marshal(map[string]int64{"unix_ms": nowMS})
+        _, code, err := s.agent.Do("POST", dev.IP, dev.AgentPort, "/v1/time/set", body)
+        if err != nil {
+            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, err.Error())
+            return
+        }
+        if code >= 400 {
+            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, fmt.Sprintf("agent error: %d", code))
+            return
+        }
+        s.updateDeviceStatus(task.ID, did, models.TaskSuccess, 1.0, "")
+        s.appendAuditLog(task, did, models.TaskSuccess, "")
+
     case "face_gallery_reload":
         _, code, err := s.agent.Do("POST", dev.IP, dev.AgentPort, "/v1/face-gallery/reload", nil)
         if err != nil {
diff --git a/internal/web/ui.go b/internal/web/ui.go
index 31de51a..238525c 100644
--- a/internal/web/ui.go
+++ b/internal/web/ui.go
@@ -1753,7 +1753,7 @@ func (u *UI) actionDevicesBatchAction(w http.ResponseWriter, r *http.Request) {
 
     typeStr := ""
     switch action {
-    case "media_start", "media_restart", "media_stop", "reload", "rollback":
+    case "media_start", "media_restart", "media_stop", "reload", "rollback", "time_sync":
         typeStr = action
     default:
         u.render(w, r, "devices", u.deviceOverviewPageData(r, deviceIDs, "不支持的操作: "+action))
diff --git a/internal/web/ui/templates/devices.html b/internal/web/ui/templates/devices.html
index ced14da..01a497b 100644
--- a/internal/web/ui/templates/devices.html
+++ b/internal/web/ui/templates/devices.html
@@ -47,6 +47,10 @@
         {{if $allOffline}}
         <button type="submit" id="cleanup-btn" name="action" value="cleanup_offline" class="danger" style="display:none" onclick="var n=document.querySelectorAll('input[name=device_id]:checked').length;return confirm('确认清理选中的 '+n+' 台离线设备及其全部关联数据？此操作不可恢复。')">清理选中离线设备</button>
         {{end}}
+        {{$drift := false}}{{range .DeviceRows}}{{if and (gt .TimeDriftSec 5) (hasString $.SelectedDeviceIDs .Device.DeviceID)}}{{$drift = true}}{{end}}{{end}}
+        {{if $drift}}
+        <button type="submit" name="action" value="time_sync" class="secondary">⏱ 时间同步</button>
+        {{end}}
         <a class="btn secondary" href="{{.BatchConfigURL}}">下发设备分配</a>
         <a class="btn secondary" href="/devices">清空选择</a>
       </div>