diff --git a/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/AssembleAction.java b/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/AssembleAction.java
index 815e838..b69592d 100644
--- a/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/AssembleAction.java
+++ b/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/AssembleAction.java
@@ -114,7 +114,8 @@ public class AssembleAction implements BusinessProcess<SendTaskModel> {
 
             if (StrUtil.isNotBlank(originValue)) {
                 String resultValue = ContentHolderUtil.replacePlaceHolder(originValue, variables);
-                ReflectUtil.setFieldValue(contentModel, field, resultValue);
+                Object resultObj = JSON.parseObject(resultValue, field.getType());
+                ReflectUtil.setFieldValue(contentModel, field, resultObj);
             }
         }