diff --git a/docs/en/advanced_guides/mixed_datasets.md b/docs/en/advanced_guides/mixed_datasets.md
index c46114bf36..1c595314b7 100644
--- a/docs/en/advanced_guides/mixed_datasets.md
+++ b/docs/en/advanced_guides/mixed_datasets.md
@@ -31,7 +31,7 @@ In this scenario, no data conversion is required for the elements from the COCO
 
 ```python
 dataset_coco = dict(
-    type='COCODataset',
+    type='CocoDataset',
     data_root='data/coco/',
     ann_file='annotations/person_keypoints_train2017.json',
     data_prefix=dict(img='train2017/'),
@@ -99,7 +99,7 @@ In this scenario, both COCO and AIC datasets need to adjust the keypoint indices
 
 ```python
 dataset_coco = dict(
-    type='COCODataset',
+    type='CocoDataset',
     data_root='data/coco/',
     ann_file='annotations/person_keypoints_train2017.json',
     data_prefix=dict(img='train2017/'),
diff --git a/docs/zh_cn/advanced_guides/mixed_datasets.md b/docs/zh_cn/advanced_guides/mixed_datasets.md
index 9bb3ac23f9..fac38e3338 100644
--- a/docs/zh_cn/advanced_guides/mixed_datasets.md
+++ b/docs/zh_cn/advanced_guides/mixed_datasets.md
@@ -31,7 +31,7 @@ COCO 和 AIC 都是 2D 人体姿态数据集。但是，这两个数据集在关
 
 ```python
 dataset_coco = dict(
-    type='COCODataset',
+    type='CocoDataset',
     data_root='data/coco/',
     ann_file='annotations/person_keypoints_train2017.json',
     data_prefix=dict(img='train2017/'),
@@ -99,7 +99,7 @@ MMPose 提供了一份完整的 [配置文件](https://github.com/open-mmlab/mmp
 
 ```python
 dataset_coco = dict(
-    type='COCODataset',
+    type='CocoDataset',
     data_root='data/coco/',
     ann_file='annotations/person_keypoints_train2017.json',
     data_prefix=dict(img='train2017/'),