diff --git a/MIGRATION.md b/MIGRATION.md
index 0206afe..7cfebb7 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -350,3 +350,9 @@ instead」）。`@koa/router` 是官方维护的继任包，API 与 koa-router *
 ### 影响范围
 
 仅文档生成器（`generate_swagger` / `generate_postman`），不涉及运行时校验、路由绑定或类型推导。已声明 response schema 的项目重新生成文档即可看到变化；未声明的项目输出与之前完全一致。
+
+## v3.2.3 — Axios SDK 路径参数兜底（issue #27）
+
+### 修复
+
+- **`generate_axios` 在未声明 `paramsSchema` 时从路径兜底提取路径参数**：此前 `getPathParams` 只读 `paramsSchema`，而 `getReqSendPath` 只看路径串，两者脱节。当路由为 `/:id` 形式但用户未调用 `.params()` / `registerTyped({ params })` 时，生成的请求路径会引用变量 `id`，但函数签名里没有 `id` 参数 → 生成引用未定义变量的坏 SDK。现在 `getPathParams` 在 `paramsSchema` 为空时从 `realPath` 的 `:xxx` 提取参数名作为兜底，保证签名与路径一致。已声明 `paramsSchema` 的场景行为不变。
diff --git a/package.json b/package.json
index 0582519..6894e41 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "erest",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "Framework-agnostic REST API framework with Zod validation, auto docs & test scaffolding. Express/Koa/@leizm/web adapters as separate packages.",
   "type": "module",
   "main": "dist/lib/index.js",
diff --git a/packages/erest-express/package.json b/packages/erest-express/package.json
index 0a48c3f..c9511dc 100644
--- a/packages/erest-express/package.json
+++ b/packages/erest-express/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@erest/express",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "Express adapter for erest",
   "type": "module",
   "main": "./dist/index.js",
diff --git a/packages/erest-gen/package.json b/packages/erest-gen/package.json
index a4593cf..50e011a 100644
--- a/packages/erest-gen/package.json
+++ b/packages/erest-gen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@erest/gen",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "erest codegen CLI：从 Zod schema 生成 handler 骨架等（实验性，独立于 erest 主版本演进）",
   "type": "module",
   "bin": {
diff --git a/packages/erest-koa/package.json b/packages/erest-koa/package.json
index d633e95..4f5086d 100644
--- a/packages/erest-koa/package.json
+++ b/packages/erest-koa/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@erest/koa",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "Koa adapter for erest",
   "type": "module",
   "main": "./dist/index.js",
diff --git a/packages/erest-leizmweb/package.json b/packages/erest-leizmweb/package.json
index ec8256e..9f8e33b 100644
--- a/packages/erest-leizmweb/package.json
+++ b/packages/erest-leizmweb/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@erest/leizmweb",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "@leizm/web adapter for erest",
   "type": "module",
   "main": "./dist/index.js",
diff --git a/src/lib/plugin/generate_axios/index.ts b/src/lib/plugin/generate_axios/index.ts
index 285c9e3..66235f3 100644
--- a/src/lib/plugin/generate_axios/index.ts
+++ b/src/lib/plugin/generate_axios/index.ts
@@ -48,8 +48,13 @@ export default function generateAxios(data: IDocData, dir: string, options: IDoc
     return `'${path}'`;
   }
 
-  function getPathParams(_req: APIOption<unknown>) {
-    const dataKeys = schemaFieldNames(_req.paramsSchema);
+  function getPathParams(req: APIOption<unknown>) {
+    // 优先用 paramsSchema 声明的字段名；缺失时从路径 :xxx 兜底，
+    // 避免生成的请求路径引用了未出现在签名里的变量（issue #27）。
+    let dataKeys = schemaFieldNames(req.paramsSchema);
+    if (!dataKeys.length && hasUrlParam(req.realPath)) {
+      dataKeys = (req.realPath.match(/:([a-z]+)/gi) || []).map((s) => s.slice(1));
+    }
     if (!dataKeys.length) return "";
     return dataKeys.map((key) => `${key},`).join("");
   }
diff --git a/src/test/test-docs-plugins.ts b/src/test/test-docs-plugins.ts
index 610ab5f..201ae35 100644
--- a/src/test/test-docs-plugins.ts
+++ b/src/test/test-docs-plugins.ts
@@ -144,3 +144,52 @@ describe("postman response 示例（issue #6）", () => {
     expect(item.response).toBeUndefined();
   });
 });
+
+describe("axios SDK 路径参数生成（issue #27）", () => {
+  function captureAxios(api: Record<string, unknown>) {
+    let captured = "";
+    const writer = (_p: string, data: string) => (captured = data);
+    generateAxios(
+      {
+        info: { title: "t", description: "d", host: "http://x", basePath: "" },
+        group: {},
+        types: {},
+        apis: { "get_/posts/:id": { method: "get", title: "t", ...api } },
+      } as any,
+      "/out",
+      { axios: "sdk.js" } as any,
+      writer
+    );
+    return captured;
+  }
+
+  test("声明了 paramsSchema 时，路径参数出现在函数签名里", () => {
+    const sdk = captureAxios({
+      realPath: "/posts/:id",
+      paramsSchema: z.object({ id: z.number() }),
+    });
+    // 函数签名应包含 id 参数
+    expect(sdk).toMatch(/getPostsId\(\s*id/);
+    // 请求路径应使用模板插值（生成器把 :id 转成 ${id}，输出带转义反斜杠）
+    expect(sdk).toContain("/posts/");
+    expect(sdk).toContain("id\\}");
+  });
+
+  test("路径含 :id 但未声明 paramsSchema 时，签名仍应补全路径参数（避免生成引用未定义变量的坏代码）", () => {
+    const sdk = captureAxios({
+      realPath: "/posts/:id",
+      // 没有 paramsSchema
+    });
+    expect(sdk).toMatch(/getPostsId\(\s*id/);
+    expect(sdk).toContain("/posts/");
+    expect(sdk).toContain("id\\}");
+  });
+
+  test("无路径参数时，签名不含多余的路径参数", () => {
+    const sdk = captureAxios({
+      realPath: "/posts",
+    });
+    expect(sdk).toMatch(/getPosts\(\s*\)/);
+    expect(sdk).toContain("'/posts'");
+  });
+});