diff --git a/embedding.js b/embedding.js
index 1fcaf32..1281628 100644
--- a/embedding.js
+++ b/embedding.js
@@ -32,17 +32,17 @@ function createCombinedAbortSignal(...signals) {
     const controller = new AbortController();
     for (const signal of validSignals) {
         if (signal.aborted) {
-            controller.abort();
+            controller.abort(signal.reason);
             return controller.signal;
         }
-        signal.addEventListener('abort', () => controller.abort(), { once: true });
+        signal.addEventListener('abort', () => controller.abort(signal.reason), { once: true });
     }
     return controller.signal;
 }
 
 async function fetchWithTimeout(url, options = {}, timeoutMs = EMBEDDING_REQUEST_TIMEOUT_MS) {
     const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), timeoutMs);
+    const timeout = setTimeout(() => controller.abort(new DOMException(`Embedding 请求超时 (${Math.round(timeoutMs / 1000)}s)`, 'AbortError')), timeoutMs);
     const signal = options.signal
         ? createCombinedAbortSignal(options.signal, controller.signal)
         : controller.signal;
diff --git a/index.js b/index.js
index d69dbd8..ba4aef3 100644
--- a/index.js
+++ b/index.js
@@ -798,7 +798,7 @@ async function fetchLocalWithTimeout(
   timeoutMs = LOCAL_VECTOR_TIMEOUT_MS,
 ) {
   const controller = new AbortController();
-  const timeout = setTimeout(() => controller.abort(), timeoutMs);
+  const timeout = setTimeout(() => controller.abort(new DOMException(`本地请求超时 (${Math.round(timeoutMs / 1000)}s)`, 'AbortError')), timeoutMs);
   let signal = controller.signal;
   if (options.signal) {
     if (
@@ -808,7 +808,7 @@ async function fetchLocalWithTimeout(
       signal = AbortSignal.any([options.signal, controller.signal]);
     } else {
       signal = controller.signal;
-      options.signal.addEventListener("abort", () => controller.abort(), {
+      options.signal.addEventListener("abort", () => controller.abort(options.signal.reason), {
         once: true,
       });
     }
diff --git a/llm.js b/llm.js
index 1f4b5c6..3063524 100644
--- a/llm.js
+++ b/llm.js
@@ -215,7 +215,7 @@ function buildJsonAttemptMessages(systemPrompt, userPrompt, attempt, reason = ''
 
 async function fetchWithTimeout(url, options = {}, timeoutMs = LLM_REQUEST_TIMEOUT_MS) {
     const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), timeoutMs);
+    const timeout = setTimeout(() => controller.abort(new DOMException(`LLM 请求超时 (${Math.round(timeoutMs / 1000)}s)`, 'AbortError')), timeoutMs);
     const signal = options.signal
         ? createCombinedAbortSignal(options.signal, controller.signal)
         : controller.signal;
@@ -243,10 +243,10 @@ function createCombinedAbortSignal(...signals) {
     const controller = new AbortController();
     for (const signal of validSignals) {
         if (signal.aborted) {
-            controller.abort();
+            controller.abort(signal.reason);
             return controller.signal;
         }
-        signal.addEventListener('abort', () => controller.abort(), { once: true });
+        signal.addEventListener('abort', () => controller.abort(signal.reason), { once: true });
     }
     return controller.signal;
 }
diff --git a/vector-index.js b/vector-index.js
index d1f198d..472470e 100644
--- a/vector-index.js
+++ b/vector-index.js
@@ -79,17 +79,17 @@ function createCombinedAbortSignal(...signals) {
   const controller = new AbortController();
   for (const signal of validSignals) {
     if (signal.aborted) {
-      controller.abort();
+      controller.abort(signal.reason);
       return controller.signal;
     }
-    signal.addEventListener("abort", () => controller.abort(), { once: true });
+    signal.addEventListener("abort", () => controller.abort(signal.reason), { once: true });
   }
   return controller.signal;
 }
 
 async function fetchWithTimeout(url, options = {}, timeoutMs = VECTOR_REQUEST_TIMEOUT_MS) {
   const controller = new AbortController();
-  const timeout = setTimeout(() => controller.abort(), timeoutMs);
+  const timeout = setTimeout(() => controller.abort(new DOMException(`向量请求超时 (${Math.round(timeoutMs / 1000)}s)`, 'AbortError')), timeoutMs);
   const signal = options.signal
     ? createCombinedAbortSignal(options.signal, controller.signal)
     : controller.signal;