diff --git a/diffsynth/pipelines/wan_video_new.py b/diffsynth/pipelines/wan_video_new.py
index 1113980..7ef4e2e 100644
--- a/diffsynth/pipelines/wan_video_new.py
+++ b/diffsynth/pipelines/wan_video_new.py
@@ -1154,7 +1154,10 @@ def model_fn_wan_video(
             else:
                 x = block(x, context, t_mod, freqs)
             if vace_context is not None and block_id in vace.vace_layers_mapping:
-                x = x + vace_hints[vace.vace_layers_mapping[block_id]] * vace_scale
+                current_vace_hint = vace_hints[vace.vace_layers_mapping[block_id]]
+                if use_unified_sequence_parallel and dist.is_initialized() and dist.get_world_size() > 1:
+                    current_vace_hint = torch.chunk(current_vace_hint, get_sequence_parallel_world_size(), dim=1)[get_sequence_parallel_rank()]
+                x = x + current_vace_hint * vace_scale
         if tea_cache is not None:
             tea_cache.store(x)