diff --git a/modelscope/models/nlp/chatglm2/text_generation.py b/modelscope/models/nlp/chatglm2/text_generation.py
index 1052b875..57a7270f 100644
--- a/modelscope/models/nlp/chatglm2/text_generation.py
+++ b/modelscope/models/nlp/chatglm2/text_generation.py
@@ -122,7 +122,12 @@ def split_tensor_along_last_dim(
 
 class RotaryEmbedding(nn.Module):
 
-    def __init__(self, dim, original_impl=False, device=None, dtype=None):
+    def __init__(self,
+                 dim,
+                 rope_ratio=1,
+                 original_impl=False,
+                 device=None,
+                 dtype=None):
         super().__init__()
         inv_freq = 1.0 / (10000**(
             torch.arange(0, dim, 2, device=device).to(dtype=dtype) / dim))
@@ -148,7 +153,8 @@ class RotaryEmbedding(nn.Module):
                    / n_elem))
 
         # Create position indexes `[0, 1, ..., seq_len - 1]`
-        seq_idx = torch.arange(seq_len, dtype=dtype, device=device)
+        seq_idx = torch.arange(
+            seq_len, dtype=dtype, device=device) / self.rope_ratio
 
         # Calculate the product of position index and $\theta_i$
         idx_theta = torch.outer(seq_idx, theta).float()
@@ -864,6 +870,7 @@ class ChatGLMModel(ChatGLMPreTrainedModel):
 
         self.rotary_pos_emb = RotaryEmbedding(
             rotary_dim // 2,
+            rope_ratio=config.rope_ratio,
             original_impl=config.original_rope,
             device=device,
             dtype=config.torch_dtype)
@@ -1169,7 +1176,7 @@ class ChatGLM2ForConditionalGeneration(ChatGLMPreTrainedModel):
               tokenizer,
               query: str,
               history: List[Tuple[str, str]] = None,
-              max_length: int = 8192,
+              max_length: int = None,
               num_beams=1,
               do_sample=True,
               top_p=0.8,
@@ -1181,6 +1188,8 @@ class ChatGLM2ForConditionalGeneration(ChatGLMPreTrainedModel):
         if logits_processor is None:
             logits_processor = LogitsProcessorList()
         logits_processor.append(InvalidScoreLogitsProcessor())
+        if max_length is None:
+            max_length = self.seq_length
         gen_kwargs = {
             'max_length': max_length,
             'num_beams': num_beams,
@@ -1204,7 +1213,7 @@ class ChatGLM2ForConditionalGeneration(ChatGLMPreTrainedModel):
                     query: str,
                     history: List[Tuple[str, str]] = None,
                     past_key_values=None,
-                    max_length: int = 8192,
+                    max_length: int = None,
                     do_sample=True,
                     top_p=0.8,
                     temperature=0.8,
@@ -1216,6 +1225,8 @@ class ChatGLM2ForConditionalGeneration(ChatGLMPreTrainedModel):
         if logits_processor is None:
             logits_processor = LogitsProcessorList()
         logits_processor.append(InvalidScoreLogitsProcessor())
+        if max_length is None:
+            max_length = self.seq_length
         gen_kwargs = {
             'max_length': max_length,
             'do_sample': do_sample,