diff --git a/src/JobForker.php b/src/JobForker.php
index a087403..b14a9c1 100644
--- a/src/JobForker.php
+++ b/src/JobForker.php
@@ -175,7 +175,7 @@ public function run(callable $runHandler, callable $failedCallback= null)
 
                 // 子进程会走到这里，直接退出
                 if ($this->isForked) {
-                    return;
+                    exit();
                 }
 
                 $keeper->setFailedCallback($failedCallback)
@@ -297,4 +297,4 @@ public function wait()
         }
         $this->statistics->report();
     }
-}
\ No newline at end of file
+}