diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index e8cf69b5..1ecc72d1 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -18,9 +18,10 @@ use think\Config;
 use think\Db;
 use think\db\Builder;
 use think\db\Connection;
+use think\db\DbException;
 use think\Exception;
-use think\exception\DbException;
 use think\exception\PDOException;
+use think\db\exception\BindParamException;
 use think\db\exception\ModelNotFoundException;
 use think\db\exception\DataNotFoundException;
 use think\Loader;
@@ -179,7 +180,7 @@ class Query
      * @param boolean $master 是否在主服务器读操作
      * @param bool|string $class 指定返回的数据集对象
      * @return mixed
-     * @throws DbBindParamException
+     * @throws BindParamException
      * @throws PDOException
      */
     public function query($sql, $bind = [], $fetch = false, $master = false, $class = false)
@@ -196,7 +197,7 @@ class Query
      * @param boolean $getLastInsID 是否获取自增ID
      * @param boolean $sequence 自增序列名
      * @return int
-     * @throws DbBindParamException
+     * @throws BindParamException
      * @throws PDOException
      */
     public function execute($sql, $bind = [], $fetch = false, $getLastInsID = false, $sequence = null)
diff --git a/library/think/db/exception/BindParamException.php b/library/think/db/exception/BindParamException.php
index 2e998875..585a0d73 100644
--- a/library/think/db/exception/BindParamException.php
+++ b/library/think/db/exception/BindParamException.php
@@ -11,16 +11,16 @@
 
 namespace think\db\exception;
 
-use think\db\Exception;
+use think\exception\DbException;
 
 /**
  * PDO参数绑定异常
  */
-class BindParamException extends Exception 
+class BindParamException extends DbException 
 {
 
     /**
-     * DbBindParamException constructor.
+     * BindParamException constructor.
      * @param string $message
      * @param array  $config
      * @param string $sql
diff --git a/library/think/db/exception/DataNotFoundException.php b/library/think/db/exception/DataNotFoundException.php
index 27569e90..ac0f416d 100644
--- a/library/think/db/exception/DataNotFoundException.php
+++ b/library/think/db/exception/DataNotFoundException.php
@@ -11,7 +11,7 @@
 
 namespace think\db\exception;
 
-use think\db\DbException;
+use think\exception\DbException;
 
 class DataNotFoundException extends DbException 
 {
diff --git a/library/think/db/exception/ModelNotFoundException.php b/library/think/db/exception/ModelNotFoundException.php
index b12db4df..aba7187b 100644
--- a/library/think/db/exception/ModelNotFoundException.php
+++ b/library/think/db/exception/ModelNotFoundException.php
@@ -11,7 +11,7 @@
 
 namespace think\db\exception;
 
-use think\db\DbException;
+use think\exception\DbException;
 
 class ModelNotFoundException extends DbException 
 {
diff --git a/library/think/db/DbException.php b/library/think/exception/DbException.php
similarity index 97%
rename from library/think/db/DbException.php
rename to library/think/exception/DbException.php
index 08c2a398..11c1c932 100644
--- a/library/think/db/DbException.php
+++ b/library/think/exception/DbException.php
@@ -9,7 +9,7 @@
 // | Author: 麦当苗儿 <zuojiazi@vip.qq.com> <http://zjzit.cn>
 // +----------------------------------------------------------------------
 
-namespace think\db;
+namespace think\exception;
 
 use think\Exception;