diff --git a/__tests__/ut/commands/deploy/impl/function_test.ts b/__tests__/ut/commands/deploy/impl/function_test.ts
index d3830585..cb14a8de 100644
--- a/__tests__/ut/commands/deploy/impl/function_test.ts
+++ b/__tests__/ut/commands/deploy/impl/function_test.ts
@@ -378,6 +378,98 @@ describe('Service', () => {
         },
       );
     });
+
+    it('should set idleTimeout to -1 when it is not configured', async () => {
+      service = new Service(mockInputs, mockOpts);
+      service.needDeploy = true;
+      Object.defineProperty(service, 'type', {
+        value: 'config',
+        writable: true,
+      });
+
+      const mockFcSdk = {
+        deployFunction: jest.fn().mockResolvedValue(undefined),
+      };
+      Object.defineProperty(service, 'fcSdk', {
+        value: mockFcSdk,
+        writable: true,
+      });
+
+      jest.spyOn(service as any, '_deployAuto').mockResolvedValue(undefined);
+
+      await service.run();
+
+      expect(service.fcSdk.deployFunction).toHaveBeenCalledWith(
+        expect.objectContaining({
+          idleTimeout: -1,
+        }),
+        expect.anything(),
+      );
+    });
+
+    it('should convert idleTimeout 0 or null to -1', async () => {
+      for (const idleTimeout of [0, null]) {
+        service = new Service(
+          { ...mockInputs, props: { ...mockInputs.props, idleTimeout } } as any,
+          mockOpts,
+        );
+        service.needDeploy = true;
+        Object.defineProperty(service, 'type', {
+          value: 'config',
+          writable: true,
+        });
+
+        const mockFcSdk = {
+          deployFunction: jest.fn().mockResolvedValue(undefined),
+        };
+        Object.defineProperty(service, 'fcSdk', {
+          value: mockFcSdk,
+          writable: true,
+        });
+
+        jest.spyOn(service as any, '_deployAuto').mockResolvedValue(undefined);
+
+        await service.run();
+
+        expect(service.fcSdk.deployFunction).toHaveBeenCalledWith(
+          expect.objectContaining({
+            idleTimeout: -1,
+          }),
+          expect.anything(),
+        );
+      }
+    });
+
+    it('should keep configured idleTimeout', async () => {
+      service = new Service(
+        { ...mockInputs, props: { ...mockInputs.props, idleTimeout: 600 } } as any,
+        mockOpts,
+      );
+      service.needDeploy = true;
+      Object.defineProperty(service, 'type', {
+        value: 'config',
+        writable: true,
+      });
+
+      const mockFcSdk = {
+        deployFunction: jest.fn().mockResolvedValue(undefined),
+      };
+      Object.defineProperty(service, 'fcSdk', {
+        value: mockFcSdk,
+        writable: true,
+      });
+
+      jest.spyOn(service as any, '_deployAuto').mockResolvedValue(undefined);
+
+      await service.run();
+
+      expect(service.fcSdk.deployFunction).toHaveBeenCalledWith(
+        expect.objectContaining({
+          idleTimeout: 600,
+        }),
+        expect.anything(),
+      );
+    });
   });
 
   describe('_getAcr', () => {
diff --git a/publish.yaml b/publish.yaml
index 643e2a98..65cb28f1 100644
--- a/publish.yaml
+++ b/publish.yaml
@@ -3,7 +3,7 @@ Type: Component
 Name: fc3
 Provider:
   - 阿里云
-Version: 0.1.25
+Version: 0.1.27
 Description: 阿里云函数计算全生命周期管理
 HomePage: https://github.com/devsapp/fc3
 Organization: 阿里云函数计算（FC）
diff --git a/src/default/config.ts b/src/default/config.ts
index f8ef3d9d..1936d102 100644
--- a/src/default/config.ts
+++ b/src/default/config.ts
@@ -42,6 +42,8 @@ export const FC_RESOURCES_EMPTY_CONFIG = {
   layers: [],
   instanceIsolationMode: 'SHARE',
   sessionAffinity: 'NONE',
+  // 服务端不支持通过省略该字段或置 0 清除线上值，-1 表示关闭延时释放弹性实例
+  idleTimeout: -1,
 };
 
 export const FC_TRIGGER_DEFAULT_CONFIG = {
diff --git a/src/subCommands/deploy/impl/function.ts b/src/subCommands/deploy/impl/function.ts
index 51821cb4..ddb40e60 100644
--- a/src/subCommands/deploy/impl/function.ts
+++ b/src/subCommands/deploy/impl/function.ts
@@ -124,6 +124,11 @@ export default class Service extends Base {
     }
     // 部署函数
     const config = _.defaults(this.local, FC_RESOURCES_EMPTY_CONFIG);
+    // idleTimeout 0 / null 均非法（服务端最小 300 且不支持空值清除），与未配置一致按关闭处理
+    if (config.idleTimeout === 0 || config.idleTimeout === null) {
+      logger.debug('idleTimeout 0/null is converted to -1 (disabled)');
+      config.idleTimeout = -1;
+    }
     if (
       !_.isEmpty(config.sessionAffinityConfig) &&
       typeof config.sessionAffinityConfig !== 'string'