diff --git a/src/memos/api/client.py b/src/memos/api/client.py
index 5e7947ff5..d45276f2c 100644
--- a/src/memos/api/client.py
+++ b/src/memos/api/client.py
@@ -14,7 +14,6 @@
 MAX_RETRY_COUNT = 3
 
 
-
 class MemOSClient:
     """MemOS API client"""
 
diff --git a/src/memos/mem_os/product.py b/src/memos/mem_os/product.py
index d64643897..65942346f 100644
--- a/src/memos/mem_os/product.py
+++ b/src/memos/mem_os/product.py
@@ -217,6 +217,26 @@ def _restore_user_instances(
         except Exception as e:
             logger.error(f"Error during user instance restoration: {e}")
 
+    def _initialize_cube_from_default_config(
+        self, cube_id: str, user_id: str, default_config: GeneralMemCubeConfig
+    ) -> GeneralMemCube | None:
+        """
+        Initialize a cube from default configuration when cube path doesn't exist.
+
+        Args:
+            cube_id (str): The cube ID to initialize.
+            user_id (str): The user ID for the cube.
+            default_config (GeneralMemCubeConfig): The default configuration to use.
+        """
+        cube_config = default_config.model_copy(deep=True)
+        # Safely modify the graph_db user_name if it exists
+        if cube_config.text_mem.config.graph_db.config:
+            cube_config.text_mem.config.graph_db.config.user_name = (
+                f"memos{user_id.replace('-', '')}"
+            )
+        mem_cube = GeneralMemCube(config=cube_config)
+        return mem_cube
+
     def _preload_user_cubes(
         self, user_id: str, default_cube_config: GeneralMemCubeConfig | None = None
     ) -> None:
@@ -286,8 +306,24 @@ def _load_user_cubes(
                         )
                     else:
                         logger.warning(
-                            f"Cube path {cube.cube_path} does not exist for cube {cube.cube_id}"
+                            f"Cube path {cube.cube_path} does not exist for cube {cube.cube_id}, now init by default config"
                         )
+                        cube_obj = self._initialize_cube_from_default_config(
+                            cube_id=cube.cube_id,
+                            user_id=user_id,
+                            default_config=default_cube_config,
+                        )
+                        if cube_obj:
+                            self.register_mem_cube(
+                                cube_obj,
+                                cube.cube_id,
+                                user_id,
+                                memory_types=[],
+                            )
+                        else:
+                            raise ValueError(
+                                f"Failed to initialize default cube {cube.cube_id} for user {user_id}"
+                            )
                 except Exception as e:
                     logger.error(f"Failed to load cube {cube.cube_id} for user {user_id}: {e}")
         logger.info(f"load user {user_id} cubes successfully")