diff --git a/v2/transmitter.py b/v2/transmitter.py
index 7606d48..c04a4e9 100644
--- a/v2/transmitter.py
+++ b/v2/transmitter.py
@@ -26,17 +26,19 @@ class Transmitter:
 
     def check_send(self):
         ts = int(time.time())
+        if self.ping_ts + 60 < ts:
+            # 保持连接
+            self.ping_ts = ts
+            print('保持连接')
+            self.db_client.execute('select 1')
+
         for h, p in self.slots.items():
             tb, buffer = h.buffer_pool
             buffer_size = len(buffer)
             if (p['ts'] + p['time_out'] <= ts or buffer_size >= p['bulk_max']) and buffer_size > 0:
                 p['ts'] = ts
                 yield tb, buffer
-        if self.ping_ts + 60 < ts:
-            # 保持连接
-            self.ping_ts = ts
-            print('保持连接')
-            self.db_client.execute('select 1')
+
 
     @staticmethod
     def flat_data(data: dict):