diff --git a/main.py b/main.py
index ecdde0a..b3e76cd 100644
--- a/main.py
+++ b/main.py
@@ -5,6 +5,7 @@ import threading
 
 from admin.GlancesMonitor import GlancesMonitor
 from utils.decorator.async_job import async_job
+from utils.markdown_to_image import warmup_md2img_browser_sync
 from configuration import Config
 from robot import Robot
 
@@ -106,6 +107,20 @@ def main():
     except Exception as e:
         robot.LOG.error(f"GlancesMonitor服务器启动失败: {e}")
 
+    # 启动后异步预热 Markdown 转图浏览器，降低首个转图任务冷启动失败概率。
+    try:
+        def _warmup_md2img():
+            ok = warmup_md2img_browser_sync(timeout_seconds=60)
+            if ok:
+                robot.LOG.info("Markdown 转图浏览器预热成功")
+            else:
+                robot.LOG.warning("Markdown 转图浏览器预热失败，运行期将按需重试")
+
+        warmup_thread = threading.Thread(target=_warmup_md2img, daemon=True)
+        warmup_thread.start()
+    except Exception as e:
+        robot.LOG.error(f"启动 Markdown 转图预热线程失败: {e}")
+
     robot.LOG.info(f"=" * 50)
     asyncio.run(async_job.run_all())
     # 让机器人一直跑
diff --git a/utils/markdown_to_image.py b/utils/markdown_to_image.py
index 8f4fe0c..5b71127 100644
--- a/utils/markdown_to_image.py
+++ b/utils/markdown_to_image.py
@@ -610,6 +610,32 @@ def _get_browser_manager() -> _PersistentBrowser:
     return _BROWSER_MANAGER
 
 
+async def warmup_md2img_browser(timeout_seconds: int = 45) -> bool:
+    """预热 Markdown 转图浏览器（异步）。
+
+    设计目的：
+    1. 服务启动后提前完成浏览器冷启动，减少首个截图任务的等待和失败概率；
+    2. 不执行实际业务截图，仅确保常驻浏览器已可用。
+    """
+    try:
+        manager = _get_browser_manager()
+        await asyncio.wait_for(manager.ensure_browser(), timeout=max(10, int(timeout_seconds)))
+        logger.info("[md2img] 浏览器预热完成")
+        return True
+    except Exception as e:
+        logger.error(f"[md2img] 浏览器预热失败: {e}")
+        return False
+
+
+def warmup_md2img_browser_sync(timeout_seconds: int = 45) -> bool:
+    """预热 Markdown 转图浏览器（同步包装，适合在线程中调用）。"""
+    try:
+        return asyncio.run(warmup_md2img_browser(timeout_seconds=timeout_seconds))
+    except Exception as e:
+        logger.error(f"[md2img] 同步预热执行失败: {e}")
+        return False
+
+
 async def html_to_image(html_content, output_image):
     manager = _get_browser_manager()
     await manager.screenshot(html_content, output_image)