diff --git a/astrbot/core/sandbox/booters/base.py b/astrbot/core/sandbox/booters/base.py
index 5fd793ee7..cee5644db 100644
--- a/astrbot/core/sandbox/booters/base.py
+++ b/astrbot/core/sandbox/booters/base.py
@@ -21,3 +21,7 @@ class SandboxBooter:
         Should return a dict with `success` (bool) and `file_path` (str) keys.
         """
         ...
+
+    async def available(self) -> bool:
+        """Check if the sandbox is available."""
+        ...
diff --git a/astrbot/core/sandbox/booters/shipyard.py b/astrbot/core/sandbox/booters/shipyard.py
index 46aa3fe53..493ad6a9c 100644
--- a/astrbot/core/sandbox/booters/shipyard.py
+++ b/astrbot/core/sandbox/booters/shipyard.py
@@ -61,3 +61,16 @@ class ShipyardBooter(SandboxBooter):
     async def upload_file(self, path: str, file_name: str) -> dict:
         """Upload file to sandbox"""
         return await self._ship.upload_file(path, file_name)
+
+    async def available(self) -> bool:
+        """Check if the sandbox is available."""
+        try:
+            ship_id = self._ship.id
+            data = await self._sandbox_client.client.get_ship(ship_id)
+            if not data:
+                return False
+            health = bool(data.get("status", 0) == 1)
+            return health
+        except Exception as e:
+            logger.error(f"Error checking Shipyard sandbox availability: {e}")
+            return False
diff --git a/astrbot/core/sandbox/sandbox_client.py b/astrbot/core/sandbox/sandbox_client.py
index bd6ca5ef4..65838d4df 100644
--- a/astrbot/core/sandbox/sandbox_client.py
+++ b/astrbot/core/sandbox/sandbox_client.py
@@ -15,6 +15,11 @@ class SandboxClient:
         session_id: str,
         booter_type: Literal["shipyard", "boxlite"] = "shipyard",
     ) -> SandboxBooter:
+        if session_id in session_booter:
+            booter = session_booter[session_id]
+            if not await booter.available():
+                # rebuild
+                session_booter.pop(session_id, None)
         if session_id not in session_booter:
             uuid_str = uuid.uuid5(uuid.NAMESPACE_DNS, session_id).hex
             if booter_type == "shipyard":