diff --git a/xxl-job-core/src/main/java/com/xxl/job/core/biz/client/ExecutorBizClient.java b/xxl-job-core/src/main/java/com/xxl/job/core/biz/client/ExecutorBizClient.java
index 9f594309..dbbcffa8 100644
--- a/xxl-job-core/src/main/java/com/xxl/job/core/biz/client/ExecutorBizClient.java
+++ b/xxl-job-core/src/main/java/com/xxl/job/core/biz/client/ExecutorBizClient.java
@@ -6,7 +6,7 @@ import com.xxl.job.core.util.XxlJobRemotingUtil;
 
 /**
  * admin api test
- *
+ * 用于调用服务端接口
  * @author xuxueli 2017-07-28 22:14:52
  */
 public class ExecutorBizClient implements ExecutorBiz {
diff --git a/xxl-job-core/src/main/java/com/xxl/job/core/biz/impl/ExecutorBizImpl.java b/xxl-job-core/src/main/java/com/xxl/job/core/biz/impl/ExecutorBizImpl.java
index a8762891..4a1510bb 100644
--- a/xxl-job-core/src/main/java/com/xxl/job/core/biz/impl/ExecutorBizImpl.java
+++ b/xxl-job-core/src/main/java/com/xxl/job/core/biz/impl/ExecutorBizImpl.java
@@ -16,7 +16,7 @@ import org.slf4j.LoggerFactory;
 
 import java.util.Date;
 
-/**
+/** 用于处理接收请求
  * Created by xuxueli on 17/3/1.
  */
 public class ExecutorBizImpl implements ExecutorBiz {
diff --git a/xxl-job-core/src/main/java/com/xxl/job/core/executor/XxlJobExecutor.java b/xxl-job-core/src/main/java/com/xxl/job/core/executor/XxlJobExecutor.java
index a1aa8a55..3a14703c 100644
--- a/xxl-job-core/src/main/java/com/xxl/job/core/executor/XxlJobExecutor.java
+++ b/xxl-job-core/src/main/java/com/xxl/job/core/executor/XxlJobExecutor.java
@@ -180,6 +180,7 @@ public class XxlJobExecutor  {
 
 
     // ---------------------- job handler repository ----------------------
+    //存储业务对象 key为 xxljob.value
     private static ConcurrentMap<String, IJobHandler> jobHandlerRepository = new ConcurrentHashMap<String, IJobHandler>();
     public static IJobHandler loadJobHandler(String name){
         return jobHandlerRepository.get(name);
@@ -239,7 +240,6 @@ public class XxlJobExecutor  {
         }
 
         // registry jobhandler
-        //注册到map中
         registJobHandler(name, new MethodJobHandler(bean, executeMethod, initMethod, destroyMethod));
 
     }
diff --git a/xxl-job-core/src/main/java/com/xxl/job/core/executor/impl/XxlJobSimpleExecutor.java b/xxl-job-core/src/main/java/com/xxl/job/core/executor/impl/XxlJobSimpleExecutor.java
index 53efbb95..33ecf5d3 100644
--- a/xxl-job-core/src/main/java/com/xxl/job/core/executor/impl/XxlJobSimpleExecutor.java
+++ b/xxl-job-core/src/main/java/com/xxl/job/core/executor/impl/XxlJobSimpleExecutor.java
@@ -14,6 +14,7 @@ import java.util.Map;
 
 /**
  * xxl-job executor (for frameless)
+ * 非spring项目 使用
  *
  * @author xuxueli 2020-11-05
  */