diff --git a/packages/handlebars/src/helpers/index.ts b/packages/handlebars/src/helpers/index.ts
index 3c59d25eb0ad08e809c07eb4127071a146da3dce..d7118c3d80377fb90b3e5b98b609de3633f508f2 100644
--- a/packages/handlebars/src/helpers/index.ts
+++ b/packages/handlebars/src/helpers/index.ts
@@ -4,6 +4,7 @@ import { HelperConcat } from './concat/concat';
 import { HelperEq } from './eq/eq';
 import { HelperGt } from './gt/gt';
 import { HelperGte } from './gte/gte';
+import { HelperIsExist } from './is-exist/is-exist';
 import { HelperJson } from './json/json';
 import { HelperLowerCase } from './lower-case/lower-case';
 import { HelperLt } from './lt/lt';
@@ -31,6 +32,7 @@ export function installHelpers(): void {
   new HelperEq();
   new HelperGt();
   new HelperGte();
+  new HelperIsExist();
   new HelperJson();
   new HelperLowerCase();
   new HelperLt();
diff --git a/packages/handlebars/src/helpers/is-exist/is-exist.ts b/packages/handlebars/src/helpers/is-exist/is-exist.ts
new file mode 100644
index 0000000000000000000000000000000000000000..87907e2ad514e7896c97b44d5f0c251f326790f5
--- /dev/null
+++ b/packages/handlebars/src/helpers/is-exist/is-exist.ts
@@ -0,0 +1,35 @@
+import * as Handlebars from 'handlebars';
+import { HelperUtil } from '../../utils';
+import { HelperBase } from '../helper-base';
+
+/**
+ * 标识是否已存在
+ *
+ * @description 判断: 标识在当前模板中是否已被引用, 用法: {{#isExist key mark}}xxx{{else}}yyy{{/eq}}、{{isExist key 'name'}} 返回值为 boolean 类型
+ * @author chitanda
+ * @date 2021-12-24 14:12:25
+ * @export
+ * @class HelperEq
+ * @extends {HelperBase}
+ */
+export class HelperIsExist extends HelperBase {
+  constructor() {
+    super('isExist');
+  }
+
+  onExecute(
+    key: string,
+    mark: string,
+    options: Handlebars.HelperOptions,
+  ): string | boolean {
+    const nameMap = options.data.nameMap || new Map<string, string[]>();
+    const marks = nameMap.get(key) || [];
+    const result = marks.indexOf(mark) !== -1;
+    if (!result) {
+      marks.push(mark);
+      nameMap.set(key, marks);
+      options.data.nameMap = nameMap;
+    }
+    return HelperUtil.handleJudgmentExecute(this, result, options);
+  }
+}
diff --git a/packages/handlebars/src/utils/helper/helper.ts b/packages/handlebars/src/utils/helper/helper.ts
index 2c26fc6b88358304722898f65129b9a73158be8c..7bf51a412e82fea78f7cd791cca3db3d4b484222 100644
--- a/packages/handlebars/src/utils/helper/helper.ts
+++ b/packages/handlebars/src/utils/helper/helper.ts
@@ -24,6 +24,7 @@ export class HelperUtil {
     'eq',
     'gt',
     'get',
+    'isExist',
     'lowerCase',
     'lt',
     'lte',
diff --git a/packages/handlebars/test/helpers/helper.test.ts b/packages/handlebars/test/helpers/helper.test.ts
index 7660d159184954c8ff92312a5e452f45ed6280c8..f5c20d5089e15b6a14ef5f823aa0210ba0998995 100644
--- a/packages/handlebars/test/helpers/helper.test.ts
+++ b/packages/handlebars/test/helpers/helper.test.ts
@@ -158,6 +158,20 @@ describe('模板助手测试', () => {
     }
   });
 
+  it('标识是否已存在: is-exist', () => {
+    {
+      const template = `{{#entities}}{{#unless (isExist 'importService' codeName)}}{{codeName}}{{/unless}}{{/entities}}`;
+      const str = engine.render(template, {
+        entities: [
+          { codeName: 'entity1' },
+          { codeName: 'entity2' },
+          { codeName: 'entity2' },
+        ],
+      });
+      expect(str).toBe('entity1entity2');
+    }
+  });
+
   it('字符串转小写: lower-case', () => {
     {
       const template = `{{lowerCase "GlobalModel"}}`;