diff --git a/backend/app/crypto_agent/executor/base_executor.py b/backend/app/crypto_agent/executor/base_executor.py
index d8a4016..f4f916c 100644
--- a/backend/app/crypto_agent/executor/base_executor.py
+++ b/backend/app/crypto_agent/executor/base_executor.py
@@ -696,12 +696,15 @@ class BaseExecutor(ABC):
         success = result.get('success', False)
         order_id = result.get('order_id', '')
         error_msg = result.get('error', result.get('message', ''))
+        already_closed = result.get('already_closed', False)
 
         if success:
-            title = f"✅ [{target_key or self.platform_name}] 撤单成功 - {symbol}"
+            title = f"✅ [{target_key or self.platform_name}] 撤单已完成 - {symbol}" if already_closed else f"✅ [{target_key or self.platform_name}] 撤单成功 - {symbol}"
 
             content_parts = self._build_notification_header(symbol, account_id, target_key)
             self._append_notification_detail(content_parts, "订单ID", order_id)
+            if already_closed:
+                self._append_notification_detail(content_parts, "状态", "订单已不在挂单列表，按已完成处理")
 
             if details and 'reason' in details:
                 self._append_notification_detail(content_parts, "撤单原因", details['reason'])
diff --git a/backend/app/services/bitget_live_trading_service.py b/backend/app/services/bitget_live_trading_service.py
index 5b2b891..16a8403 100644
--- a/backend/app/services/bitget_live_trading_service.py
+++ b/backend/app/services/bitget_live_trading_service.py
@@ -581,7 +581,22 @@ class BitgetLiveTradingService:
             if success:
                 logger.info(f"✅ Bitget 单笔撤单成功: {symbol} #{order_id}")
                 return {"success": True, "order_id": normalized_order_id, "symbol": symbol}
-            return {"success": False, "order_id": str(order_id), "error": "cancel_order 返回 False"}
+
+            # 某些场景下，交易所会返回 False，但订单实际上已经成交/撤销/失效。
+            # 为了避免误报，再做一次挂单列表确认；若已不在 open orders 中，视为幂等成功。
+            refreshed_open_orders = self.get_open_orders(symbol)
+            still_exists = any(str(o.get('order_id', '')) == normalized_order_id for o in refreshed_open_orders)
+            if not still_exists:
+                logger.info(f"ℹ️ Bitget 撤单返回 False，但订单已不在挂单列表，视为完成: {symbol} #{order_id}")
+                return {
+                    "success": True,
+                    "order_id": normalized_order_id,
+                    "symbol": symbol,
+                    "already_closed": True,
+                    "message": "订单撤单请求后已不在挂单列表，可能已成交、已撤销或已失效",
+                }
+
+            return {"success": False, "order_id": str(order_id), "error": "cancel_order 返回 False，且订单仍存在于挂单列表"}
         except Exception as e:
             logger.error(f"❌ Bitget 单笔撤单失败: {symbol} #{order_id} {e}")
             return {"success": False, "order_id": str(order_id), "error": str(e)}
diff --git a/backend/tests/test_bitget_live_trading_service.py b/backend/tests/test_bitget_live_trading_service.py
index 68ae6af..07f46c9 100644
--- a/backend/tests/test_bitget_live_trading_service.py
+++ b/backend/tests/test_bitget_live_trading_service.py
@@ -250,6 +250,46 @@ class TestGetPositionForSymbol:
         assert pos['coin'] == 'ETH'
 
 
+class TestCancelOrder:
+
+    def test_cancel_order_returns_success_when_order_missing_before_cancel(self):
+        service, mock_api = make_service()
+        service.get_open_orders = MagicMock(return_value=[])
+
+        result = service.cancel_order('SOL', '123')
+
+        assert result['success'] is True
+        assert result['already_closed'] is True
+        mock_api.cancel_order.assert_not_called()
+
+    def test_cancel_order_returns_success_when_exchange_false_but_order_disappears(self):
+        service, mock_api = make_service()
+        service.get_open_orders = MagicMock(side_effect=[
+            [{'order_id': '123', 'symbol': 'SOL'}],
+            [],
+        ])
+        mock_api.cancel_order.return_value = False
+
+        result = service.cancel_order('SOL', '123')
+
+        assert result['success'] is True
+        assert result['already_closed'] is True
+        assert '可能已成交' in result['message']
+
+    def test_cancel_order_returns_failure_when_exchange_false_and_order_still_exists(self):
+        service, mock_api = make_service()
+        service.get_open_orders = MagicMock(side_effect=[
+            [{'order_id': '123', 'symbol': 'SOL'}],
+            [{'order_id': '123', 'symbol': 'SOL'}],
+        ])
+        mock_api.cancel_order.return_value = False
+
+        result = service.cancel_order('SOL', '123')
+
+        assert result['success'] is False
+        assert '仍存在于挂单列表' in result['error']
+
+
 # ==================== TestPlaceMarketOrder ====================
 
 class TestPlaceMarketOrder: