diff --git a/colossalai/autochunk/autochunk_codegen.py b/colossalai/autochunk/autochunk_codegen.py
index dcc6bba9e..fbd5d5e36 100644
--- a/colossalai/autochunk/autochunk_codegen.py
+++ b/colossalai/autochunk/autochunk_codegen.py
@@ -220,7 +220,9 @@ if CODEGEN_AVAILABLE:
             self.max_memory = max_memory
             self.meta_node = list(meta_graph.graph.nodes)
             # find the chunk regions
-            self.chunk_region_search = ChunkRegionSearch(meta_graph, max_memory, print_mem)
+            self.chunk_region_search = ChunkRegionSearch(
+                meta_graph, max_memory, print_mem
+            )
             self.chunk_infos = self.chunk_region_search.search_region()
 
         def _gen_python_code(
diff --git a/colossalai/autochunk/chunk_region_search.py b/colossalai/autochunk/chunk_region_search.py
index 76b02cade..7a0e8a36c 100644
--- a/colossalai/autochunk/chunk_region_search.py
+++ b/colossalai/autochunk/chunk_region_search.py
@@ -1,8 +1,13 @@
+import copy
+
+from .chunk_selector import ChunkSelector
 from .index_tracer import IndexTracer
 from .memory_estiamtor import MemoryEstimator
-from .chunk_selector import ChunkSelector
-import copy
-from .utils import is_non_compute_node, is_non_compute_node_except_placeholder, get_node_shape
+from .utils import (
+    get_node_shape,
+    is_non_compute_node,
+    is_non_compute_node_except_placeholder,
+)
 
 
 class ChunkRegionSearch(object):
@@ -11,7 +16,7 @@ class ChunkRegionSearch(object):
         self.print_mem = print_mem
         self.index_tracer = IndexTracer(list(gm.graph.nodes))
         self.index_tracer.trace_index()
-        self.memory_estimator = MemoryEstimator(self.index_tracer)
+        self.memory_estimator = MemoryEstimator()
         self.chunk_selector = ChunkSelector(
             self.index_tracer, self.memory_estimator, max_memory=max_memory
         )
@@ -211,4 +216,3 @@ class ChunkRegionSearch(object):
                 self.index_tracer.node_list, chunk_infos, print_mem=True
             )
         return chunk_infos
-
diff --git a/colossalai/autochunk/memory_estiamtor.py b/colossalai/autochunk/memory_estiamtor.py
index c3d8b1803..034f59e52 100644
--- a/colossalai/autochunk/memory_estiamtor.py
+++ b/colossalai/autochunk/memory_estiamtor.py
@@ -16,7 +16,7 @@ from .utils import (
 
 
 class MemoryEstimator(object):
-    def __init__(self, index_tracer: IndexTracer) -> None:
+    def __init__(self) -> None:
         pass
 
     def _get_meta_node_size(self, x):