diff --git a/astrbot/core/platform/sources/webchat/webchat_event.py b/astrbot/core/platform/sources/webchat/webchat_event.py
index bc1e1a6bcd..ed988773df 100644
--- a/astrbot/core/platform/sources/webchat/webchat_event.py
+++ b/astrbot/core/platform/sources/webchat/webchat_event.py
@@ -109,14 +109,22 @@ async def _send(
                     },
                 )
             elif isinstance(comp, File):
-                # save file to local
+                # save file to local with original name
                 file_path = await comp.get_file()
                 original_name = comp.name or os.path.basename(file_path)
-                ext = os.path.splitext(original_name)[1] or ""
-                filename = f"{uuid.uuid4()!s}{ext}"
-                dest_path = os.path.join(attachments_dir, filename)
+                safe_name = os.path.basename(original_name)
+                dest_path = os.path.join(attachments_dir, safe_name)
+                name_part, ext_part = os.path.splitext(safe_name)
+                # dedup: if file with same name exists, append a counter
+                counter = 1
+                max_attempts = 1000
+                while os.path.exists(dest_path) and counter <= max_attempts:
+                    dest_path = os.path.join(
+                        attachments_dir, f"{name_part}_{counter}{ext_part}"
+                    )
+                    counter += 1
                 shutil.copy2(file_path, dest_path)
-                data = f"[FILE]{filename}"
+                data = f"[FILE]{os.path.basename(dest_path)}"
                 await web_chat_back_queue.put(
                     {
                         "type": "file",