diff --git a/tools/diffusion/ic_layout_diffusion_optimized.py b/tools/diffusion/ic_layout_diffusion_optimized.py
index 8920741..4cc0997 100644
--- a/tools/diffusion/ic_layout_diffusion_optimized.py
+++ b/tools/diffusion/ic_layout_diffusion_optimized.py
@@ -207,12 +207,12 @@ class ManhattanAwareUNet(nn.Module):
             self._make_block(512, 1024, stride=2),
         ])
 
-        # 残差投影层 - 确保残差连接的通道数匹配
+        # 残差投影层 - 确保残差连接的通道数和空间尺寸匹配
         self.residual_projections = nn.ModuleList([
-            nn.Conv2d(64, 128, 1),  # 64 -> 128
-            nn.Conv2d(128, 256, 1), # 128 -> 256
-            nn.Conv2d(256, 512, 1), # 256 -> 512
-            nn.Conv2d(512, 1024, 1), # 512 -> 1024
+            nn.Conv2d(64, 128, 1),           # 64 -> 128, 保持尺寸
+            nn.Conv2d(128, 256, 3, stride=2, padding=1), # 128 -> 256, 尺寸减半
+            nn.Conv2d(256, 512, 3, stride=2, padding=1), # 256 -> 512, 尺寸减半
+            nn.Conv2d(512, 1024, 3, stride=2, padding=1), # 512 -> 1024, 尺寸减半
         ])
 
         # 中间层