diff --git a/llm_web_kit/input/pre_data_json.py b/llm_web_kit/input/pre_data_json.py
index 7902d093..8eec7cc2 100644
--- a/llm_web_kit/input/pre_data_json.py
+++ b/llm_web_kit/input/pre_data_json.py
@@ -34,6 +34,8 @@ class PreDataJsonKey:
     TYPICAL_DICT_HTML = 'typical_dict_html'
     # 动态id开关
     DYNAMIC_ID_ENABLE = 'dynamic_id_enable'
+    # 动态classid开关
+    DYNAMIC_CLASSID_ENABLE = 'dynamic_classid_enable'
     # 推广原网页
     HTML_SOURCE = 'html_source'
     # 推广网页提取正文成功标签, bool类型
diff --git a/llm_web_kit/main_html_parser/parser/layout_batch_parser.py b/llm_web_kit/main_html_parser/parser/layout_batch_parser.py
index de7038f6..d4641f17 100644
--- a/llm_web_kit/main_html_parser/parser/layout_batch_parser.py
+++ b/llm_web_kit/main_html_parser/parser/layout_batch_parser.py
@@ -65,8 +65,10 @@ def parse(self, pre_data: PreDataJson) -> PreDataJson:
                 layer = self.__get_max_width_layer(template_data)
             feature1 = get_feature(template_main_html)
             feature2 = get_feature(body)
-            sim = similarity(feature1, feature2, layer_n=layer)
-            if sim < SIMILARITY_THRESHOLD:
+            sim = None
+            if feature1 is not None and feature2 is not None:
+                sim = similarity(feature1, feature2, layer_n=layer)
+            if sim is None or sim < SIMILARITY_THRESHOLD:
                 pre_data[PreDataJsonKey.MAIN_HTML_SUCCESS] = False
             else:
                 pre_data[PreDataJsonKey.MAIN_HTML_SUCCESS] = True
diff --git a/llm_web_kit/main_html_parser/parser/tag_mapping.py b/llm_web_kit/main_html_parser/parser/tag_mapping.py
index 91b074d1..8d525281 100644
--- a/llm_web_kit/main_html_parser/parser/tag_mapping.py
+++ b/llm_web_kit/main_html_parser/parser/tag_mapping.py
@@ -52,10 +52,12 @@ def parse(self, pre_data: PreDataJson) -> PreDataJson:
             feature1 = get_feature(template_raw_html)
             feature2 = get_feature(template_extract_html)
             layer = self.__get_max_width_layer(element_dict)
-            template_sim = similarity(feature1, feature2, layer_n=layer)
+            template_sim = None
+            if feature1 is not None and feature2 is not None:
+                template_sim = similarity(feature1, feature2, layer_n=layer)
 
             # 比较模版正文html与原html相似度
-            if template_sim > SIMILAR_THRESHOLD:
+            if template_sim is None or template_sim > SIMILAR_THRESHOLD:
                 pre_data[PreDataJsonKey.TYPICAL_MAIN_HTML_SUCCESS] = False
             else:
                 pre_data[PreDataJsonKey.TYPICAL_MAIN_HTML_SUCCESS] = True
diff --git a/tests/llm_web_kit/input/test_pre_data_json.py b/tests/llm_web_kit/input/test_pre_data_json.py
index 502ee37c..5371fee9 100644
--- a/tests/llm_web_kit/input/test_pre_data_json.py
+++ b/tests/llm_web_kit/input/test_pre_data_json.py
@@ -391,6 +391,7 @@ def test_pre_data_json_key_constants(self):
         assert hasattr(PreDataJsonKey, 'MAIN_HTML_SUCCESS')
         assert hasattr(PreDataJsonKey, 'TYPICAL_DICT_HTML')
         assert hasattr(PreDataJsonKey, 'DYNAMIC_ID_ENABLE')
+        assert hasattr(PreDataJsonKey, 'DYNAMIC_CLASSID_ENABLE')
 
         # Check actual values
         assert PreDataJsonKey.DOMAIN_NAME == 'domain_name'
diff --git a/tests/llm_web_kit/main_html_parser/parser/test_layout_parser.py b/tests/llm_web_kit/main_html_parser/parser/test_layout_parser.py
index 50836314..af2b6aec 100644
--- a/tests/llm_web_kit/main_html_parser/parser/test_layout_parser.py
+++ b/tests/llm_web_kit/main_html_parser/parser/test_layout_parser.py
@@ -167,7 +167,7 @@ def test_dynamic_id(self):
         # 推广
         pre_data[PreDataJsonKey.HTML_SOURCE] = expand_source
         pre_data[PreDataJsonKey.DYNAMIC_ID_ENABLE] = True
-        pre_data['dynamic_classid_enable'] = True
+        pre_data[PreDataJsonKey.DYNAMIC_CLASSID_ENABLE] = True
         parser = LayoutBatchParser(element_dict)
         parts = parser.parse(pre_data)
         main_html_body = parts[PreDataJsonKey.MAIN_HTML_BODY]
@@ -207,7 +207,7 @@ def test_dynamic_classid(self):
         # 推广
         pre_data[PreDataJsonKey.HTML_SOURCE] = expand_source
         pre_data[PreDataJsonKey.DYNAMIC_ID_ENABLE] = True
-        pre_data['dynamic_classid_enable'] = True
+        pre_data[PreDataJsonKey.DYNAMIC_CLASSID_ENABLE] = True
         parser = LayoutBatchParser(element_dict)
         parts = parser.parse(pre_data)
         main_html_body = parts[PreDataJsonKey.MAIN_HTML_BODY]
@@ -230,7 +230,7 @@ def test_dynamic_classid(self):
         # 推广
         pre_data[PreDataJsonKey.HTML_SOURCE] = expand_source2
         pre_data[PreDataJsonKey.DYNAMIC_ID_ENABLE] = True
-        pre_data['dynamic_classid_enable'] = True
+        pre_data[PreDataJsonKey.DYNAMIC_CLASSID_ENABLE] = True
         parser = LayoutBatchParser(element_dict)
         parts = parser.parse(pre_data)
         main_html_body = parts[PreDataJsonKey.MAIN_HTML_BODY]