diff --git a/python/sglang/srt/speculative/eagle_utils.py b/python/sglang/srt/speculative/eagle_utils.py
index b1032c83b..099c71cfb 100644
--- a/python/sglang/srt/speculative/eagle_utils.py
+++ b/python/sglang/srt/speculative/eagle_utils.py
@@ -177,29 +177,21 @@ class EagleVerifyInput:
         spec_steps: int,
         num_verify_token: int,
     ):
-        score_list = torch.cat(score_list, dim=1).flatten(
-            1
-        )  # b, n, topk; n= 1 + (num_steps-1) * self.topk
-        ss_token_list = torch.cat(
-            token_list, dim=1
-        )  # b, (self.topk + (num_steps-1) * self.topk)
-        top_scores = torch.topk(score_list, num_verify_token - 1, dim=-1)
-        top_scores_index = top_scores.indices
-        top_scores_index = torch.sort(top_scores_index).values
-        draft_tokens = torch.gather(ss_token_list, index=top_scores_index, dim=1)
-        draft_tokens = torch.cat((verified_id.unsqueeze(1), draft_tokens), dim=1)
-        parent_list = torch.cat(parents_list[:-1], dim=1)
-        tree_mask, position, retrive_index, retrive_cum_len = build_tree_kernel(
-            parent_list,
-            top_scores_index,
-            seq_lens,
-            seq_lens_sum,
-            topk,
-            spec_steps,
-            num_verify_token,
+        tree_mask, position, retrive_index, retrive_cum_len, draft_tokens = (
+            build_tree_kernel(
+                verified_id,
+                score_list,
+                token_list,
+                parents_list,
+                seq_lens,
+                seq_lens_sum,
+                topk,
+                spec_steps,
+                num_verify_token,
+            )
         )
         return cls(
-            draft_tokens.flatten(),
+            draft_tokens,
             tree_mask,
             position,
             retrive_index,