diff --git a/lib/generator.js b/lib/generator.js
index 50ead3b..65bf5ad 100644
--- a/lib/generator.js
+++ b/lib/generator.js
@@ -14,6 +14,8 @@ const RUNTIME = 'runtime_';
 const {
   _name,
   _type,
+  _escape,
+  _string,
   _lowerFirst,
   _subModelName,
   remove,
@@ -1027,7 +1029,7 @@ class Visitor {
     let comments = DSL.comment.getFrontComments(this.comments, ast.tokenRange[0]);
     this.visitComments(comments, level);
     if (ast.type === 'objectField') {
-      var key = _name(ast.fieldName);
+      var key = _escape(_name(ast.fieldName) || _string(ast.fieldName));
       this.emit(`new TeaPair("${key}", `, level);
       this.visitObjectFieldValue(ast.expr, level);
     } else {
diff --git a/lib/helper.js b/lib/helper.js
index ff93df6..1da9be4 100644
--- a/lib/helper.js
+++ b/lib/helper.js
@@ -152,7 +152,20 @@ function md2Html(mdText) {
   return htmlText;
 }
 
+function _escape(str) {
+  return str.includes('-') ? `'${str}'` : str;
+}
+
+function _string(str) {
+  if (str.string === '""') {
+    return '\\"\\"';
+  }
+  return str.string.replace(/([^\\])"+|^"/g, function (str) {
+    return str.replace(/"/g, '\\"');
+  });
+}
+
 module.exports = {
-  _name, _type,
+  _name, _type, _escape, _string,
   _lowerFirst, _subModelName, remove, _upperFirst, md2Html
 };
diff --git a/package.json b/package.json
index 5e127a2..151b420 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "author": "Alibaba Cloud OpenAPI Team",
   "license": "Apache-2.0",
   "dependencies": {
-    "@darabonba/parser": "^1.2.9",
+    "@darabonba/parser": "^1.4.7",
     "@darabonba/annotation-parser": "^1.0.0",
     "html-entities": "^1.3.1",
     "xml2js": "^0.5.0",
diff --git a/test/fixtures/function/Client.java b/test/fixtures/function/Client.java
index 4edf743..97070ce 100644
--- a/test/fixtures/function/Client.java
+++ b/test/fixtures/function/Client.java
@@ -15,7 +15,8 @@ public static java.util.Map<String, String> helloMap() throws Exception {
         return TeaConverter.merge(String.class,
             TeaConverter.buildMap(
                 new TeaPair("key", "value"),
-                new TeaPair("key-1", "value-1")
+                new TeaPair("'key-1'", "value-1"),
+                new TeaPair("\"\"", "value-2")
             ),
             m
         );
diff --git a/test/fixtures/function/main.dara b/test/fixtures/function/main.dara
index 02ff0a6..b79a19a 100644
--- a/test/fixtures/function/main.dara
+++ b/test/fixtures/function/main.dara
@@ -7,7 +7,8 @@ static function helloMap(): map[string]string {
   m.test = "test";
   return {
     key = 'value',
-    key-1 = 'value-1',
+    'key-1' = 'value-1',
+    '""' = 'value-2',
     ...m,
   };
 }