diff --git a/.changeset/fifty-starfishes-remain.md b/.changeset/fifty-starfishes-remain.md
new file mode 100644
index 00000000000..a1de76ab56a
--- /dev/null
+++ b/.changeset/fifty-starfishes-remain.md
@@ -0,0 +1,6 @@
+---
+'@modern-js/runtime': patch
+---
+
+fix: parse `routerDataFnArgs` in `mergeLoaderData` function
+fix: 在 `mergeLoaderData` 函数中解析 routerDataFnArgs
diff --git a/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx b/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
index 82505304b6a..3d981b2296a 100644
--- a/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
+++ b/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
@@ -82,7 +82,7 @@ const DeferredDataScripts = (props?: {
             return {
               key,
               routerDataFnName: 's',
-              routerDataFnArgs: [routeId, key],
+              routerDataFnArgs: [serializeJson(routeId), serializeJson(key)],
             };
           } else {
             const trackedPromise = deferredData.data[key] as TrackedPromise;
@@ -98,7 +98,10 @@ const DeferredDataScripts = (props?: {
               return {
                 key,
                 routerDataFnName: 'p',
-                routerDataFnArgs: [undefined, serializeJson(error)],
+                routerDataFnArgs: [
+                  serializeJson(undefined),
+                  serializeJson(error),
+                ],
               };
             } else {
               if (typeof trackedPromise._data === 'undefined') {
diff --git a/packages/runtime/plugin-runtime/src/router/runtime/constants.ts b/packages/runtime/plugin-runtime/src/router/runtime/constants.ts
index 56d9fded8d9..ed31cb2c7a9 100644
--- a/packages/runtime/plugin-runtime/src/router/runtime/constants.ts
+++ b/packages/runtime/plugin-runtime/src/router/runtime/constants.ts
@@ -101,9 +101,15 @@ export const preResolvedFnStr = `function p(e,r){return void 0!==r?Promise.rejec
  * Abstracting the above logic to `mergeLoaderData`:
  *  function mergeLoaderData (routeIdJsonStr, deferredKeyPromiseManifests) {
       const source = deferredKeyPromiseManifests.reduce(function(o, {key, routerDataFnName, routerDataFnArgs }) {
-        return {...o, [key]: _ROUTER_DATA[routerDataFnName](...routerDataFnArgs)}
+        const args = routerDataFnArgs.map(arg => {
+          if (arg === 'undefined' || arg === null) {
+            return undefined;
+          }
+          return JSON.parse(arg);
+        });
+        return {...o, [key]: _ROUTER_DATA[routerDataFnName](...args)};
       }, {});
       Object.assign(_ROUTER_DATA.loaderData[routeIdJsonStr], source);
     };
  */
-export const mergeLoaderDataStr = `function mergeLoaderData(a,e){e=e.reduce(function(a,{key:e,routerDataFnName:r,routerDataFnArgs:t}){return{...a,[e]:_ROUTER_DATA[r](...t)}},{});Object.assign(_ROUTER_DATA.loaderData[a],e)}`;
+export const mergeLoaderDataStr = `function mergeLoaderData(e,n){const r=n.reduce((function(e,{key:n,routerDataFnName:r,routerDataFnArgs:a}){const t=a.map((e=>{if("undefined"!==e&&null!==e)return JSON.parse(e)}));return console.info("args",t),{...e,[n]:_ROUTER_DATA[r](...t)}}),{});Object.assign(_ROUTER_DATA.loaderData[e],r)}`;