diff --git a/datax-executor/src/main/java/com/wugui/datax/executor/service/command/BuildCommand.java b/datax-executor/src/main/java/com/wugui/datax/executor/service/command/BuildCommand.java
index 328ca846..2e0f7535 100644
--- a/datax-executor/src/main/java/com/wugui/datax/executor/service/command/BuildCommand.java
+++ b/datax-executor/src/main/java/com/wugui/datax/executor/service/command/BuildCommand.java
@@ -24,6 +24,7 @@ public class BuildCommand {
 
     /**
      * DataX command build
+     *
      * @param tgParam
      * @param tmpFilePath
      * @param dataXPyPath
@@ -47,6 +48,14 @@ public class BuildCommand {
         return cmdArr.toArray(new String[cmdArr.size()]);
     }
 
+    /**
+     * 构建datax运行虚拟机参数
+     *
+     * @param tgParam
+     * @return {@link String}
+     * @author Locki
+     * @date 2020/9/18
+     */
     private static String buildDataXParam(TriggerParam tgParam) {
         StringBuilder doc = new StringBuilder();
         String jvmParam = StringUtils.isNotBlank(tgParam.getJvmParam()) ? tgParam.getJvmParam().trim() : tgParam.getJvmParam();
@@ -56,6 +65,14 @@ public class BuildCommand {
         return doc.toString();
     }
 
+    /**
+     * 构建datax增量参数
+     *
+     * @param tgParam
+     * @return {@link HashMap< String, String>}
+     * @author Locki
+     * @date 2020/9/18
+     */
     public static HashMap<String, String> buildDataXParamToMap(TriggerParam tgParam) {
         String partitionStr = tgParam.getPartitionInfo();
         Integer incrementType = tgParam.getIncrementType();
@@ -95,6 +112,14 @@ public class BuildCommand {
         return null;
     }
 
+    /**
+     * 任务参数封装为map
+     *
+     * @param formatParam
+     * @return {@link HashMap< String, String>}
+     * @author Locki
+     * @date 2020/9/18
+     */
     private static HashMap<String, String> getKeyValue(String formatParam) {
         String[] paramArr = formatParam.split(PARAMS_SYSTEM);
         HashMap<String, String> map = new HashMap<String, String>();
@@ -109,6 +134,25 @@ public class BuildCommand {
         return map;
     }
 
+    /**
+     * datax任务内置变量：模仿阿里云商用DataWorks/ODPS提供内置变量<br/>
+     * ${datax_bizdate}
+     * ${datax_biztime}
+     * ${datax_biz_unixtimestamp}
+     *
+     * @param
+     * @return {@link Map< String, String>}
+     * @author Locki
+     * @date 2020/9/18
+     */
+    public static Map<String, String> builtInVar(){
+        Map<String, String> map = new HashMap<String, String>();
+        map.put("datax_biz_date", DateUtil.format(new Date(), "yyyy-MM-dd"));
+        map.put("datax_biz_time", DateUtil.format(new Date(), "yyyy-MM-dd HH:mm:ss"));
+        map.put("datax_biz_unixtimestamp", System.currentTimeMillis() + "");
+        return map;
+    }
+
     private void buildPartitionCM(StringBuilder doc, String partitionStr) {
         if (StringUtils.isNotBlank(partitionStr)) {
             doc.append(SPLIT_SPACE);
diff --git a/datax-executor/src/main/java/com/wugui/datax/executor/service/jobhandler/ExecutorJobHandler.java b/datax-executor/src/main/java/com/wugui/datax/executor/service/jobhandler/ExecutorJobHandler.java
index 5ad80569..45699dd8 100644
--- a/datax-executor/src/main/java/com/wugui/datax/executor/service/jobhandler/ExecutorJobHandler.java
+++ b/datax-executor/src/main/java/com/wugui/datax/executor/service/jobhandler/ExecutorJobHandler.java
@@ -23,8 +23,7 @@ import java.util.concurrent.FutureTask;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import static com.wugui.datax.executor.service.command.BuildCommand.buildDataXExecutorCmd;
-import static com.wugui.datax.executor.service.command.BuildCommand.buildDataXParamToMap;
+import static com.wugui.datax.executor.service.command.BuildCommand.*;
 import static com.wugui.datax.executor.service.jobhandler.DataXConstant.DEFAULT_JSON;
 import static com.wugui.datax.executor.service.logparse.AnalysisStatistics.analysisStatisticsLog;
 
@@ -55,7 +54,9 @@ public class ExecutorJobHandler extends IJobHandler {
         LogStatistics logStatistics = null;
 
         HashMap<String, String> keyValueMap = buildDataXParamToMap(trigger);
-        String jobJson = replaceVariable(trigger.getJobJson(),keyValueMap);
+        String jobJson = replaceVariable(trigger.getJobJson(), keyValueMap);
+        Map<String, String> buildin = builtInVar();
+        jobJson = replaceVariable(jobJson, buildin);
 
         //Generate JSON temporary file
         tmpFilePath = generateTemJsonFile(jobJson);
@@ -107,7 +108,19 @@ public class ExecutorJobHandler extends IJobHandler {
         }
     }
 
-    public static String replaceVariable(final String param,HashMap<String, String> variableMap) {
+    /**
+     * 替换json变量
+     *
+     * @param param
+     * @param variableMap
+     * @return {@link String}
+     * @author Locki
+     * @date 2020/9/18
+     */
+    public static String replaceVariable(final String param, Map<String, String> variableMap) {
+        if (variableMap == null || variableMap.size() < 1) {
+            return param;
+        }
         Map<String, String> mapping = new HashMap<String, String>();
 
         Matcher matcher = VARIABLE_PATTERN.matcher(param);