diff --git a/library/think/cache/driver/File.php b/library/think/cache/driver/File.php
index f02f6e7a..95021e05 100644
--- a/library/think/cache/driver/File.php
+++ b/library/think/cache/driver/File.php
@@ -189,7 +189,7 @@ class File extends Driver
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
-            $value = $step;
+            $value = -$step;
         }
         return $this->set($name, $value, 0) ? $value : false;
     }
diff --git a/library/think/cache/driver/Lite.php b/library/think/cache/driver/Lite.php
index 2e541851..6ca8072e 100644
--- a/library/think/cache/driver/Lite.php
+++ b/library/think/cache/driver/Lite.php
@@ -149,7 +149,7 @@ class Lite extends Driver
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
-            $value = $step;
+            $value = -$step;
         }
         return $this->set($name, $value, 0) ? $value : false;
     }
diff --git a/library/think/cache/driver/Sqlite.php b/library/think/cache/driver/Sqlite.php
index dd7cc957..0860f4fd 100644
--- a/library/think/cache/driver/Sqlite.php
+++ b/library/think/cache/driver/Sqlite.php
@@ -159,7 +159,7 @@ class Sqlite extends Driver
         if ($this->has($name)) {
             $value = $this->get($name) - $step;
         } else {
-            $value = $step;
+            $value = -$step;
         }
         return $this->set($name, $value, 0) ? $value : false;
     }