diff --git a/ding/model/template/vac.py b/ding/model/template/vac.py
index 948ff3b9c39bd23934ea3a3b019a6d828c73a72a..d776259ee70ce93375326ed93a7ad9ca3c8f66e0 100644
--- a/ding/model/template/vac.py
+++ b/ding/model/template/vac.py
@@ -25,7 +25,7 @@ class VAC(nn.Module):
             continuous: bool = False,
             encoder_hidden_size_list: SequenceType = [128, 128, 64],
             actor_head_hidden_size: int = 64,
-            actor_head_layer_num: int = 2,
+            actor_head_layer_num: int = 1,
             critic_head_hidden_size: int = 64,
             critic_head_layer_num: int = 1,
             activation: Optional[nn.Module] = nn.ReLU(),