diff --git a/docutranslate/agents/segments_agent.py b/docutranslate/agents/segments_agent.py
index d21ea2e..21b754b 100644
--- a/docutranslate/agents/segments_agent.py
+++ b/docutranslate/agents/segments_agent.py
@@ -323,6 +323,10 @@ class SegmentsTranslateAgent(Agent):
 
         # Non-MT mode: JSON batch translation
         indexed_originals, chunks, merged_indices_list = segments2json_chunks(segments, chunk_size)
+        self.logger.info(
+            f"分块统计: 段数={len(segments)}, 总字符={sum(len(s) for s in segments)}, "
+            f"chunk_size={chunk_size}, 预计请求={len(chunks)}"
+        )
         prompts = [generate_prompt(json.dumps(chunk, ensure_ascii=False, indent=0), self.to_lang) for chunk in chunks]
         translated_chunks = super().send_prompts(prompts=prompts, json_format=self.force_json,
                                                  pre_send_handler=self._pre_send_handler,
@@ -414,6 +418,10 @@ class SegmentsTranslateAgent(Agent):
         # Non-MT mode: JSON batch translation
         indexed_originals, chunks, merged_indices_list = await asyncio.to_thread(segments2json_chunks, segments,
                                                                                  chunk_size)
+        self.logger.info(
+            f"分块统计: 段数={len(segments)}, 总字符={sum(len(s) for s in segments)}, "
+            f"chunk_size={chunk_size}, 预计请求={len(chunks)}"
+        )
         prompts = [generate_prompt(json.dumps(chunk, ensure_ascii=False, indent=0), self.to_lang) for chunk in chunks]
         translated_chunks = await super().send_prompts_async(prompts=prompts, force_json=self.force_json,
                                                              pre_send_handler=self._pre_send_handler,
diff --git a/docutranslate/static/index.html b/docutranslate/static/index.html
index 0e69fe4..cedcf41 100644
--- a/docutranslate/static/index.html
+++ b/docutranslate/static/index.html
@@ -1120,7 +1120,7 @@
                 custom_to_lang: '',
                 thinking: 'disable',
                 custom_prompt: '',
-                chunk_size: 1000,
+                chunk_size: 6000,
                 concurrent: 5,
                 temperature: 0.1,
                 retry: 3,
@@ -1187,7 +1187,7 @@
                 form.custom_to_lang = get('translator_custom_to_lang', '');
                 form.thinking = get('translator_thinking_mode', 'default');
                 form.custom_prompt = get('custom_prompt', '');
-                form.chunk_size = getNum('chunk_size', 1000);
+                form.chunk_size = getNum('chunk_size', 6000);
                 form.concurrent = getNum('concurrent', 5);
                 form.temperature = getNum('temperature', 0.1);
                 form.retry = getNum('retry', 3);