diff --git a/core/src/main/java/com/taobao/arthas/core/command/Constants.java b/core/src/main/java/com/taobao/arthas/core/command/Constants.java
index 0c6c3deef..3cb018bc4 100644
--- a/core/src/main/java/com/taobao/arthas/core/command/Constants.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/Constants.java
@@ -31,6 +31,7 @@ public interface Constants {
                                 "  params\n" +
                                 "  params[0]\n" +
                                 "  'params[0]+params[1]'\n" +
+                                "  '{params[0], target, returnObj}'\n" +
                                 "  returnObj\n" +
                                 "  throwExp\n" +
                                 "  target\n" +
diff --git a/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchCommand.java b/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchCommand.java
index 8796260a8..351075b9b 100644
--- a/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchCommand.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchCommand.java
@@ -20,6 +20,7 @@ import com.taobao.middleware.cli.annotations.Summary;
 @Description(Constants.EXPRESS_DESCRIPTION + "\nExamples:\n" +
         "  watch -b org.apache.commons.lang.StringUtils isBlank params\n" +
         "  watch -f org.apache.commons.lang.StringUtils isBlank returnObj\n" +
+        "  watch org.apache.commons.lang.StringUtils isBlank '{params, target, returnObj}' -x 2\n" +
         "  watch -bf *StringUtils isBlank params\n" +
         "  watch *StringUtils isBlank params[0]\n" +
         "  watch *StringUtils isBlank params[0] params[0].length==1\n" +