diff --git a/event/src/main/java/com/zfoo/event/manager/EventBus.java b/event/src/main/java/com/zfoo/event/manager/EventBus.java
index a96ad4b1..721a7bd7 100644
--- a/event/src/main/java/com/zfoo/event/manager/EventBus.java
+++ b/event/src/main/java/com/zfoo/event/manager/EventBus.java
@@ -47,7 +47,7 @@ public abstract class EventBus {
      * EN: The size of the thread pool. Event's thread pool is often used to do time-consuming operations, so set it a little bigger
      * CN: 线程池的大小. event的线程池经常用来做一些耗时的操作，所以要设置大一点
      */
-    private static final int EXECUTORS_SIZE = Runtime.getRuntime().availableProcessors() * 2 + 1;
+    private static final int EXECUTORS_SIZE = Math.max(Runtime.getRuntime().availableProcessors(), 4) * 2 + 1;
 
     private static final ExecutorService[] executors = new ExecutorService[EXECUTORS_SIZE];