diff --git a/src/services/speaker/base.ts b/src/services/speaker/base.ts
index 08ac031..5875faf 100644
--- a/src/services/speaker/base.ts
+++ b/src/services/speaker/base.ts
@@ -5,7 +5,8 @@ import {
   getMiIOT,
   getMiNA,
 } from "mi-service-lite";
-import { clamp, jsonEncode, sleep } from "../../utils/base";
+import { clamp, sleep } from "../../utils/base";
+import { jsonEncode } from "../../utils/parse";
 import { Logger } from "../../utils/log";
 import { StreamResponse } from "./stream";
 import { kAreYouOK } from "../../utils/string";
diff --git a/src/utils/base.ts b/src/utils/base.ts
index e98b41a..e80fd84 100644
--- a/src/utils/base.ts
+++ b/src/utils/base.ts
@@ -1,4 +1,5 @@
 import { isEmpty } from "./is";
+import { jsonEncode } from "./parse"
 
 export function timestamp() {
   return new Date().getTime();
@@ -87,24 +88,6 @@ export function toSet<T = any>(datas: T[], byKey?: (e: T) => any) {
   return Array.from(new Set(datas));
 }
 
-export function jsonEncode(obj: any, options?: { prettier?: boolean }) {
-  const { prettier } = options ?? {};
-  try {
-    return prettier ? JSON.stringify(obj, undefined, 4) : JSON.stringify(obj);
-  } catch (error) {
-    return undefined;
-  }
-}
-
-export function jsonDecode(json: string | null | undefined) {
-  if (json == undefined) return undefined;
-  try {
-    return JSON.parse(json!);
-  } catch (error) {
-    return undefined;
-  }
-}
-
 export function withDefault<T = any>(e: any, defaultValue: T): T {
   return isEmpty(e) ? defaultValue : e;
 }
diff --git a/src/utils/io.ts b/src/utils/io.ts
index 24275c0..5e07e5a 100644
--- a/src/utils/io.ts
+++ b/src/utils/io.ts
@@ -1,7 +1,7 @@
 import fs from "fs-extra";
 import path from "path";
 
-import { jsonDecode, jsonEncode } from "./base";
+import { jsonDecode, jsonEncode } from "./parse";
 
 export const kRoot = process.cwd();
 
diff --git a/src/utils/parse.ts b/src/utils/parse.ts
new file mode 100644
index 0000000..6dbdc94
--- /dev/null
+++ b/src/utils/parse.ts
@@ -0,0 +1,32 @@
+/**
+ * 清理掉json字符串前后的其他字符,并解码
+ */
+export function cleanJsonAndDecode(input: string | undefined | null) {
+  if (input == undefined) return undefined;
+  const pattern = /(\{[\s\S]*?"\s*:\s*[\s\S]*?})/;
+  const match = input.match(pattern);
+
+  if (!match) {
+    return undefined;
+  }
+
+  return jsonDecode(match[0]);
+}
+
+export function jsonEncode(obj: any, options?: { prettier?: boolean }) {
+  const { prettier } = options ?? {};
+  try {
+    return prettier ? JSON.stringify(obj, undefined, 4) : JSON.stringify(obj);
+  } catch (error) {
+    return undefined;
+  }
+}
+
+export function jsonDecode(json: string | null | undefined) {
+  if (json == undefined) return undefined;
+  try {
+    return JSON.parse(json!);
+  } catch (error) {
+    return undefined;
+  }
+}