diff --git a/backend/internal/handlers/stock.go b/backend/internal/handlers/stock.go
index fb90c11..b941b52 100644
--- a/backend/internal/handlers/stock.go
+++ b/backend/internal/handlers/stock.go
@@ -147,7 +147,7 @@ func (h *StockHandler) SyncStatus(c *gin.Context) {
 }
 
 // TriggerSync 手动触发同步（管理员）。
-// 系统管理员点击时同步近半年历史数据，其他管理员只同步当天。
+// 系统管理员点击时异步同步近半年历史数据，其他管理员只同步当天。
 func (h *StockHandler) TriggerSync(c *gin.Context) {
 	user, ok := middleware.GetCurrentUser(c)
 	if !ok {
@@ -155,18 +155,18 @@ func (h *StockHandler) TriggerSync(c *gin.Context) {
 		return
 	}
 
-	var count int
+	var job *models.StockSyncJob
 	var err error
 	if user.Role == models.RoleSystemAdmin {
-		count, err = h.Svc.SyncHistory(c.Request.Context(), "manual", 6)
+		job, err = h.Svc.StartSyncHistory(c.Request.Context(), "manual", 6)
 	} else {
-		count, err = h.Svc.Sync(c.Request.Context(), "manual")
+		job, err = h.Svc.StartSync(c.Request.Context(), "manual")
 	}
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "error": err.Error()})
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"success": true, "records_count": count})
+	c.JSON(http.StatusOK, gin.H{"success": true, "job": job})
 }
 
 type distributionRow struct {
diff --git a/backend/internal/services/stock_sync.go b/backend/internal/services/stock_sync.go
index b522922..ef62cc6 100644
--- a/backend/internal/services/stock_sync.go
+++ b/backend/internal/services/stock_sync.go
@@ -52,10 +52,31 @@ func (s *StockSyncService) SyncHistory(ctx context.Context, triggerBy string, mo
 	})
 }
 
-func (s *StockSyncService) runSyncJob(ctx context.Context, triggerBy string, fn func() (int, error)) (int, error) {
-	s.mu.Lock()
-	defer s.mu.Unlock()
+// StartSync 异步启动一次盘后同步，返回已创建的 job。
+func (s *StockSyncService) StartSync(ctx context.Context, triggerBy string) (*models.StockSyncJob, error) {
+	job, err := s.createJob(ctx, triggerBy)
+	if err != nil {
+		return nil, err
+	}
+	go s.runSyncJobByID(context.Background(), job.ID, func(ctx context.Context) (int, error) {
+		return s.doSync(ctx)
+	})
+	return job, nil
+}
 
+// StartSyncHistory 异步启动近 N 个月历史同步，返回已创建的 job。
+func (s *StockSyncService) StartSyncHistory(ctx context.Context, triggerBy string, months int) (*models.StockSyncJob, error) {
+	job, err := s.createJob(ctx, triggerBy)
+	if err != nil {
+		return nil, err
+	}
+	go s.runSyncJobByID(context.Background(), job.ID, func(ctx context.Context) (int, error) {
+		return s.doSyncHistory(ctx, months)
+	})
+	return job, nil
+}
+
+func (s *StockSyncService) createJob(ctx context.Context, triggerBy string) (*models.StockSyncJob, error) {
 	job := models.StockSyncJob{
 		JobDate:   today(),
 		Status:    "running",
@@ -63,25 +84,46 @@ func (s *StockSyncService) runSyncJob(ctx context.Context, triggerBy string, fn
 		TriggerBy: triggerBy,
 	}
 	if err := s.db.WithContext(ctx).Create(&job).Error; err != nil {
-		return 0, fmt.Errorf("create sync job: %w", err)
+		return nil, fmt.Errorf("create sync job: %w", err)
 	}
+	return &job, nil
+}
 
+func (s *StockSyncService) runSyncJob(ctx context.Context, triggerBy string, fn func() (int, error)) (int, error) {
+	job, err := s.createJob(ctx, triggerBy)
+	if err != nil {
+		return 0, err
+	}
 	recordsCount, err := fn()
+	s.finishJob(ctx, job.ID, recordsCount, err)
+	return recordsCount, err
+}
 
+func (s *StockSyncService) runSyncJobByID(ctx context.Context, jobID string, fn func(context.Context) (int, error)) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	recordsCount, err := fn(ctx)
+	s.finishJob(ctx, jobID, recordsCount, err)
+}
+
+func (s *StockSyncService) finishJob(ctx context.Context, jobID string, recordsCount int, jobErr error) {
 	now := time.Now().UTC()
 	updates := map[string]any{
 		"records_count": recordsCount,
 		"finished_at":   &now,
 	}
-	if err != nil {
+	if jobErr != nil {
 		updates["status"] = "failed"
-		updates["error_message"] = err.Error()
+		updates["error_message"] = jobErr.Error()
+		log.Printf("[stock sync] job %s failed: %v", jobID, jobErr)
 	} else {
 		updates["status"] = "success"
+		log.Printf("[stock sync] job %s success, records=%d", jobID, recordsCount)
+	}
+	if err := s.db.WithContext(ctx).Model(&models.StockSyncJob{}).Where("id = ?", jobID).Updates(updates).Error; err != nil {
+		log.Printf("[stock sync] update job %s failed: %v", jobID, err)
 	}
-	s.db.WithContext(ctx).Model(&job).Updates(updates)
-
-	return recordsCount, err
 }
 
 func (s *StockSyncService) doSync(ctx context.Context) (int, error) {
diff --git a/frontend/src/components/StockOverview.tsx b/frontend/src/components/StockOverview.tsx
index c1dde35..2672106 100644
--- a/frontend/src/components/StockOverview.tsx
+++ b/frontend/src/components/StockOverview.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react'
+import { useEffect, useRef, useState } from 'react'
 import {
   BarChart3,
   TrendingUp,
@@ -24,6 +24,7 @@ export function StockOverview({ role }: StockOverviewProps) {
   const [loading, setLoading] = useState(true)
   const [syncing, setSyncing] = useState(false)
   const [error, setError] = useState('')
+  const pollRef = useRef<number | null>(null)
 
   const canSync = canManageUsers(role)
 
@@ -43,20 +44,52 @@ export function StockOverview({ role }: StockOverviewProps) {
 
   useEffect(() => {
     fetchAll()
+    return () => {
+      if (pollRef.current) {
+        window.clearInterval(pollRef.current)
+      }
+    }
   }, [])
 
+  const startPolling = () => {
+    if (pollRef.current) {
+      window.clearInterval(pollRef.current)
+    }
+    pollRef.current = window.setInterval(async () => {
+      try {
+        const j = await api.stockSyncStatus()
+        setJob(j)
+        if (!j || j.status !== 'running') {
+          if (pollRef.current) {
+            window.clearInterval(pollRef.current)
+            pollRef.current = null
+          }
+          setSyncing(false)
+          await fetchAll()
+          if (j?.status === 'failed') {
+            setError(j.error_message || '同步失败')
+          }
+        }
+      } catch (err: any) {
+        if (pollRef.current) {
+          window.clearInterval(pollRef.current)
+          pollRef.current = null
+        }
+        setSyncing(false)
+        setError(err?.message || '轮询同步状态失败')
+      }
+    }, 2000)
+  }
+
   const handleSync = async () => {
     setSyncing(true)
     setError('')
     try {
-      const res = await api.triggerStockSync()
-      await fetchAll()
-      // eslint-disable-next-line no-console
-      console.log('synced', res.records_count, 'records')
+      await api.triggerStockSync()
+      startPolling()
     } catch (err: any) {
-      setError(err?.message || '同步失败')
-    } finally {
       setSyncing(false)
+      setError(err?.message || '同步失败')
     }
   }
 
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index 11bc79e..99cee31 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -58,7 +58,7 @@ export interface SyncJob {
   records_count: number
   started_at: string
   finished_at?: string
-  error_message: string
+  error_message?: string
   trigger_by: string
 }
 
@@ -147,5 +147,5 @@ export const api = {
   stockSyncStatus: () => request<SyncJob | null>('/api/stocks/sync/status'),
 
   triggerStockSync: () =>
-    request<{ records_count: number }>('/api/admin/stocks/sync', { method: 'POST' }),
+    request<{ job: SyncJob }>('/api/admin/stocks/sync', { method: 'POST' }),
 }