diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
index 62c989f1d..ecf95edc3 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
@@ -373,7 +373,9 @@ public void close() {
         for (Pipeline pipeline : pipelines) {
             destroyEach(pipeline);
         }
-        threadPool.shutdown();
+        if (executorService == null) {
+            threadPool.shutdown();
+        }
     }
 
     private void destroyEach(Object object) {