diff --git a/python/llm/src/bigdl/llm/transformers/convert.py b/python/llm/src/bigdl/llm/transformers/convert.py
index 07f929c3..86fd7914 100644
--- a/python/llm/src/bigdl/llm/transformers/convert.py
+++ b/python/llm/src/bigdl/llm/transformers/convert.py
@@ -153,7 +153,8 @@ def optimize(model):
         # todo implement 4.28.0 ~ 4.30.2
         pass
 
-    if "chatglm2" in model.config._name_or_path:
+    if "chatglm-18b" in model.config._name_or_path or "chatglm2" in model.config._name_or_path:
+        # chatglm-18b or chatglm2-6b
         modeling_module_name = model.__class__.__module__
         module = importlib.import_module(modeling_module_name)
         from bigdl.llm.transformers.models.chatglm2 import chatglm2_attention_forward_8eb45c
@@ -166,6 +167,7 @@ def optimize(model):
                         module.CoreAttention,
                         core_attn_forward_8eb45c)
     elif "chatglm" in model.config._name_or_path:
+        # chatglm-6b
         modeling_module_name = model.__class__.__module__
         module = importlib.import_module(modeling_module_name)
         from bigdl.llm.transformers.models.chatglm import chatglm_attention_forward