diff --git a/library/think/Cache.php b/library/think/Cache.php
index c7a48789..7ae31aae 100644
--- a/library/think/Cache.php
+++ b/library/think/Cache.php
@@ -115,14 +115,13 @@ class Cache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public static function inc($name, $step = 1, $expire = null)
+    public static function inc($name, $step = 1)
     {
         self::init();
         self::$writeTimes++;
-        return self::$handler->inc($name, $step, $expire);
+        return self::$handler->inc($name, $step);
     }
 
     /**
@@ -130,14 +129,13 @@ class Cache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public static function dec($name, $step = 1, $expire = null)
+    public static function dec($name, $step = 1)
     {
         self::init();
         self::$writeTimes++;
-        return self::$handler->dec($name, $step, $expire);
+        return self::$handler->dec($name, $step);
     }
 
     /**
diff --git a/library/think/cache/driver/File.php b/library/think/cache/driver/File.php
index 7f496e7d..97ee2bf6 100644
--- a/library/think/cache/driver/File.php
+++ b/library/think/cache/driver/File.php
@@ -161,17 +161,16 @@ class File
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) + $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
@@ -179,17 +178,16 @@ class File
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
diff --git a/library/think/cache/driver/Lite.php b/library/think/cache/driver/Lite.php
index e83f73e4..41c94d06 100644
--- a/library/think/cache/driver/Lite.php
+++ b/library/think/cache/driver/Lite.php
@@ -118,17 +118,16 @@ class Lite
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) + $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
@@ -136,17 +135,16 @@ class Lite
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
diff --git a/library/think/cache/driver/Memcache.php b/library/think/cache/driver/Memcache.php
index 44de09b4..62f98bce 100644
--- a/library/think/cache/driver/Memcache.php
+++ b/library/think/cache/driver/Memcache.php
@@ -105,10 +105,9 @@ class Memcache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         return $this->handler->increment($name, $step);
     }
@@ -118,10 +117,9 @@ class Memcache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         return $this->handler->decrement($name, $step);
     }
diff --git a/library/think/cache/driver/Memcached.php b/library/think/cache/driver/Memcached.php
index a53533fb..2eec2ea2 100644
--- a/library/think/cache/driver/Memcached.php
+++ b/library/think/cache/driver/Memcached.php
@@ -111,10 +111,9 @@ class Memcached
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         return $this->handler->increment($name, $step);
     }
@@ -124,10 +123,9 @@ class Memcached
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         return $this->handler->decrement($name, $step);
     }
diff --git a/library/think/cache/driver/Redis.php b/library/think/cache/driver/Redis.php
index c1749e27..99f9583d 100644
--- a/library/think/cache/driver/Redis.php
+++ b/library/think/cache/driver/Redis.php
@@ -111,10 +111,9 @@ class Redis
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         return $this->handler->incrby($name, $step);
     }
@@ -124,10 +123,9 @@ class Redis
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         return $this->handler->decrby($name, $step);
     }
diff --git a/library/think/cache/driver/Sqlite.php b/library/think/cache/driver/Sqlite.php
index 6814773a..a7cbfa01 100644
--- a/library/think/cache/driver/Sqlite.php
+++ b/library/think/cache/driver/Sqlite.php
@@ -115,17 +115,16 @@ class Sqlite
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) + $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
@@ -133,17 +132,16 @@ class Sqlite
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
             $value = $step;
         }
-        return $this->set($name, $value, $expire) ? $value : false;
+        return $this->set($name, $value, 0) ? $value : false;
     }
 
     /**
diff --git a/library/think/cache/driver/Wincache.php b/library/think/cache/driver/Wincache.php
index 940ecc4e..e8e79b47 100644
--- a/library/think/cache/driver/Wincache.php
+++ b/library/think/cache/driver/Wincache.php
@@ -90,12 +90,11 @@ class Wincache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
-        return wincache_ucache_inc($name, $step, $expire);
+        return wincache_ucache_inc($name, $step);
     }
 
     /**
@@ -103,12 +102,11 @@ class Wincache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
-        return wincache_ucache_dec($name, $step, $expire);
+        return wincache_ucache_dec($name, $step);
     }
 
     /**
diff --git a/library/think/cache/driver/Xcache.php b/library/think/cache/driver/Xcache.php
index 99b01f6b..e58e5102 100644
--- a/library/think/cache/driver/Xcache.php
+++ b/library/think/cache/driver/Xcache.php
@@ -90,12 +90,11 @@ class Xcache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function inc($name, $step = 1, $expire = null)
+    public function inc($name, $step = 1)
     {
-        return xcache_inc($name, $step, $expire);
+        return xcache_inc($name, $step);
     }
 
     /**
@@ -103,12 +102,11 @@ class Xcache
      * @access public
      * @param string    $name 缓存变量名
      * @param int       $step 步长
-     * @param int       $expire  有效时间 0为永久
      * @return false|int
      */
-    public function dec($name, $step = 1, $expire = null)
+    public function dec($name, $step = 1)
     {
-        return xcache_dec($name, $step, $expire);
+        return xcache_dec($name, $step);
     }
 
     /**