diff --git a/mmyolo/models/layers/ema.py b/mmyolo/models/layers/ema.py
index aeea81a6..02ed2041 100644
--- a/mmyolo/models/layers/ema.py
+++ b/mmyolo/models/layers/ema.py
@@ -75,6 +75,11 @@ class ExpMomentumEMA(MMDET_ExpMomentumEMA):
         averaged_param.lerp_(source_param, momentum)
 
     def update_parameters(self, model: nn.Module):
+        """Update the parameters after each training step.
+
+        Args:
+            model (nn.Module): The model of the parameter needs to be updated.
+        """
         if self.steps == 0:
             for k, p_avg in self.avg_parameters.items():
                 p_avg.data.copy_(self.src_parameters[k].data)
diff --git a/mmyolo/models/layers/yolo_bricks.py b/mmyolo/models/layers/yolo_bricks.py
index 76bc84cc..d8f14205 100644
--- a/mmyolo/models/layers/yolo_bricks.py
+++ b/mmyolo/models/layers/yolo_bricks.py
@@ -16,6 +16,7 @@ if digit_version(torch.__version__) >= digit_version('1.7.0'):
 else:
 
     class SiLU(nn.Module):
+        """Sigmoid Weighted Liner Unit."""
 
         def __init__(self, inplace=True):
             super().__init__()
@@ -83,7 +84,10 @@ class SPPFBottleneck(BaseModule):
             act_cfg=act_cfg)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        """Forward process."""
+        """Forward process
+        Args:
+            x (Tensor): The input tensor.
+        """
         x = self.conv1(x)
         if isinstance(self.kernel_sizes, int):
             y1 = self.poolings(x)
@@ -183,7 +187,13 @@ class RepVGGBlock(nn.Module):
                 act_cfg=None)
 
     def forward(self, inputs: torch.Tensor) -> torch.Tensor:
-        """Forward process."""
+        """Forward process.
+        Args:
+            inputs (Tensor): The input tensor.
+
+        Returns:
+            Tensor: The output tensor.
+        """
         if hasattr(self, 'rbr_reparam'):
             return self.nonlinearity(self.se(self.rbr_reparam(inputs)))
 
@@ -196,7 +206,11 @@ class RepVGGBlock(nn.Module):
             self.se(self.rbr_dense(inputs) + self.rbr_1x1(inputs) + id_out))
 
     def get_equivalent_kernel_bias(self):
-        """Derives the equivalent kernel and bias in a differentiable way."""
+        """Derives the equivalent kernel and bias in a differentiable way.
+
+        Returns:
+            tuple: Equivalent kernel and bias
+        """
         kernel3x3, bias3x3 = self._fuse_bn_tensor(self.rbr_dense)
         kernel1x1, bias1x1 = self._fuse_bn_tensor(self.rbr_1x1)
         kernelid, biasid = self._fuse_bn_tensor(self.rbr_identity)
@@ -204,7 +218,13 @@ class RepVGGBlock(nn.Module):
             kernel1x1) + kernelid, bias3x3 + bias1x1 + biasid
 
     def _pad_1x1_to_3x3_tensor(self, kernel1x1):
-        """Pad 1x1 tensor to 3x3."""
+        """Pad 1x1 tensor to 3x3.
+        Args:
+            kernel1x1 (Tensor): The input 1x1 kernel need to be padded.
+
+        Returns:
+            Tensor: 3x3 kernel after padded.
+        """
         if kernel1x1 is None:
             return 0
         else:
@@ -278,7 +298,14 @@ class RepVGGBlock(nn.Module):
 
 
 class RepStageBlock(nn.Module):
-    """RepStageBlock is a stage block with rep-style basic block."""
+    """RepStageBlock is a stage block with rep-style basic block.
+
+    Args:
+        in_channels (int): The input channels of this Module.
+        out_channels (int): The output channels of this Module.
+        n (int, tuple[int]): Number of blocks.  Defaults to 1.
+        block (nn.Module): Basic unit of RepStage. Defaults to RepVGGBlock.
+    """
 
     def __init__(self,
                  in_channels: int,
@@ -291,6 +318,13 @@ class RepStageBlock(nn.Module):
                                      for _ in range(n - 1))) if n > 1 else None
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
+        """Forward process.
+        Args:
+            inputs (Tensor): The input tensor.
+
+        Returns:
+            Tensor: The output tensor.
+        """
         x = self.conv1(x)
         if self.block is not None:
             x = self.block(x)