diff --git a/library/think/model/relation/HasMany.php b/library/think/model/relation/HasMany.php
index 2f0d30b8..f883a57c 100644
--- a/library/think/model/relation/HasMany.php
+++ b/library/think/model/relation/HasMany.php
@@ -11,7 +11,6 @@
 
 namespace think\model\relation;
 
-use think\Db;
 use think\db\Query;
 use think\Loader;
 use think\Model;
diff --git a/library/think/model/relation/HasManyThrough.php b/library/think/model/relation/HasManyThrough.php
index dd6f6a55..ab153693 100644
--- a/library/think/model/relation/HasManyThrough.php
+++ b/library/think/model/relation/HasManyThrough.php
@@ -11,7 +11,6 @@
 
 namespace think\model\relation;
 
-use think\Db;
 use think\db\Query;
 use think\Exception;
 use think\Loader;
diff --git a/library/think/model/relation/MorphMany.php b/library/think/model/relation/MorphMany.php
index 6b1ca7b3..2307645c 100644
--- a/library/think/model/relation/MorphMany.php
+++ b/library/think/model/relation/MorphMany.php
@@ -11,7 +11,6 @@
 
 namespace think\model\relation;
 
-use think\Db;
 use think\db\Query;
 use think\Exception;
 use think\Loader;
diff --git a/library/think/model/relation/MorphOne.php b/library/think/model/relation/MorphOne.php
index 9e231d68..e873aa04 100644
--- a/library/think/model/relation/MorphOne.php
+++ b/library/think/model/relation/MorphOne.php
@@ -11,7 +11,6 @@
 
 namespace think\model\relation;
 
-use think\Db;
 use think\db\Query;
 use think\Exception;
 use think\Loader;
diff --git a/tests/thinkphp/library/think/requestTest.php b/tests/thinkphp/library/think/requestTest.php
index 7d89fa36..f86546e6 100644
--- a/tests/thinkphp/library/think/requestTest.php
+++ b/tests/thinkphp/library/think/requestTest.php
@@ -17,7 +17,6 @@ namespace tests\thinkphp\library\think;
 
 use think\Config;
 use think\Request;
-use think\Route;
 
 class requestTest extends \PHPUnit_Framework_TestCase
 {