diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index 69cd7a9d..51919fbb 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -35,6 +35,8 @@ abstract class Connection
     protected $lastInsID;
     // 返回或者影响记录数
     protected $numRows = 0;
+    // 事务的数据库连接
+    protected $transPDO;
     // 事务指令数
     protected $transTimes = 0;
     // 事务标识
@@ -450,6 +452,9 @@ abstract class Connection
         if (0 == $this->transTimes) {
             $this->transLabel = $label;
             $this->linkID->beginTransaction();
+            if (1 == $this->config['deploy']) {
+                $this->transPDO = $this->linkID;
+            }
         }
         $this->transTimes++;
         return;
@@ -467,6 +472,9 @@ abstract class Connection
             try {
                 $this->linkID->commit();
                 $this->transTimes = 0;
+                if (1 == $this->config['deploy']) {
+                    $this->transPDO = null;
+                }
             } catch (\PDOException $e) {
                 throw new PDOException($e, $this->config, $this->queryStr);
             }
@@ -485,6 +493,9 @@ abstract class Connection
             try {
                 $this->linkID->rollback();
                 $this->transTimes = 0;
+                if (1 == $this->config['deploy']) {
+                    $this->transPDO = null;
+                }
             } catch (\PDOException $e) {
                 throw new PDOException($e, $this->config, $this->queryStr);
             }
@@ -505,13 +516,13 @@ abstract class Connection
             return false;
         }
         // 自动启动事务支持
-        $this->startTrans();
+        $this->startTrans(NOW_TIME);
         try {
             foreach ($sql as $_sql) {
                 $result = $this->execute($_sql);
             }
             // 提交事务
-            $this->commit();
+            $this->commit(NOW_TIME);
         } catch (\PDOException $e) {
             $this->rollback();
             return false;
@@ -689,8 +700,13 @@ abstract class Connection
     protected function initConnect($master = true)
     {
         if (!empty($this->config['deploy'])) {
-            // 采用分布式数据库
-            $this->linkID = $this->multiConnect($master);
+            if ($this->transPDO) {
+                // 使用事务连接
+                $this->linkID = $this->transPDO;
+            } else {
+                // 采用分布式数据库
+                $this->linkID = $this->multiConnect($master);
+            }
         } elseif (!$this->linkID) {
             // 默认单数据库
             $this->linkID = $this->connect();