diff --git a/torch_npu/profiler/analysis/prof_parse/_cann_file_parser.py b/torch_npu/profiler/analysis/prof_parse/_cann_file_parser.py
index 83827d6c18b92eb1c614a8618bdba96055908288..b8cbf5ed7da36fe6192fe023b6d5a9517967d1ac 100644
--- a/torch_npu/profiler/analysis/prof_parse/_cann_file_parser.py
+++ b/torch_npu/profiler/analysis/prof_parse/_cann_file_parser.py
@@ -1,6 +1,8 @@
 import ast
 import json
 import os
+import ijson
+from io import BytesIO
 import re
 from enum import Enum
 from json import JSONDecodeError
@@ -96,14 +98,16 @@ class CANNFileParser:
         if not data:
             return []
         try:
-            data = json.loads(data)
-        except JSONDecodeError as e:
+            result = []
+            byte_data = data.encode('utf-8')
+            # 配置 ijson 使用 float 而不是 Decimal
+            items = ijson.items(BytesIO(byte_data), 'item', use_float=True)
+            for item in items:
+                if isinstance(item, dict):
+                    result.append(item)
+            return result
+        except Exception as e:
             raise RuntimeError("Invalid CANN trace data." + prof_error(ErrCode.VALUE)) from e
-        if not isinstance(data, list):
-            return []
-        if data and not isinstance(data[0], dict):
-            return []
-        return data
 
     @classmethod
     def _json_dict_load(cls, data: str) -> dict: