diff --git a/tutorials/train/change_detection/bit.py b/tutorials/train/change_detection/bit.py
index e550d19a..209701b8 100644
--- a/tutorials/train/change_detection/bit.py
+++ b/tutorials/train/change_detection/bit.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建BIT模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.BIT()
+model = pdrs.tasks.cd.BIT()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/cdnet.py b/tutorials/train/change_detection/cdnet.py
index 142919be..731a1209 100644
--- a/tutorials/train/change_detection/cdnet.py
+++ b/tutorials/train/change_detection/cdnet.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建CDNet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.CDNet()
+model = pdrs.tasks.cd.CDNet()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/dsamnet.py b/tutorials/train/change_detection/dsamnet.py
index 3a337a68..f9b45e14 100644
--- a/tutorials/train/change_detection/dsamnet.py
+++ b/tutorials/train/change_detection/dsamnet.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建DSAMNet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.DSAMNet()
+model = pdrs.tasks.cd.DSAMNet()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/dsifn.py b/tutorials/train/change_detection/dsifn.py
index 6f0d11b2..1a8b02f8 100644
--- a/tutorials/train/change_detection/dsifn.py
+++ b/tutorials/train/change_detection/dsifn.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建DSIFN模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.DSIFN()
+model = pdrs.tasks.cd.DSIFN()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/fc_ef.py b/tutorials/train/change_detection/fc_ef.py
index af5ca9c0..7dab6c81 100644
--- a/tutorials/train/change_detection/fc_ef.py
+++ b/tutorials/train/change_detection/fc_ef.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建FC-EF模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.FCEarlyFusion()
+model = pdrs.tasks.cd.FCEarlyFusion()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/fc_siam_conc.py b/tutorials/train/change_detection/fc_siam_conc.py
index 71c8f0e9..dedf7dc5 100644
--- a/tutorials/train/change_detection/fc_siam_conc.py
+++ b/tutorials/train/change_detection/fc_siam_conc.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建FC-Siam-conc模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.FCSiamConc()
+model = pdrs.tasks.cd.FCSiamConc()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/fc_siam_diff.py b/tutorials/train/change_detection/fc_siam_diff.py
index 22f49119..ab7ad717 100644
--- a/tutorials/train/change_detection/fc_siam_diff.py
+++ b/tutorials/train/change_detection/fc_siam_diff.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建FC-Siam-diff模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.FCSiamDiff()
+model = pdrs.tasks.cd.FCSiamDiff()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/snunet.py b/tutorials/train/change_detection/snunet.py
index fdc9411d..d05f9099 100644
--- a/tutorials/train/change_detection/snunet.py
+++ b/tutorials/train/change_detection/snunet.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建SNUNet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.SNUNet()
+model = pdrs.tasks.cd.SNUNet()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/change_detection/stanet.py b/tutorials/train/change_detection/stanet.py
index fea77ac6..c7a990f7 100644
--- a/tutorials/train/change_detection/stanet.py
+++ b/tutorials/train/change_detection/stanet.py
@@ -74,7 +74,7 @@
 # 使用默认参数构建STANet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/change_detector.py
-model = pdrs.tasks.STANet()
+model = pdrs.tasks.cd.STANet()
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/classification/hrnet.py b/tutorials/train/classification/hrnet.py
index 5c3ff68e..3e06794f 100644
--- a/tutorials/train/classification/hrnet.py
+++ b/tutorials/train/classification/hrnet.py
@@ -70,7 +70,7 @@
 # 使用默认参数构建HRNet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/classifier.py
-model = pdrs.tasks.HRNet_W18_C(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.clas.HRNet_W18_C(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/classification/mobilenetv3.py b/tutorials/train/classification/mobilenetv3.py
index 80bd5392..6334b60b 100644
--- a/tutorials/train/classification/mobilenetv3.py
+++ b/tutorials/train/classification/mobilenetv3.py
@@ -70,7 +70,8 @@
 # 使用默认参数构建MobileNetV3模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/classifier.py
-model = pdrs.tasks.MobileNetV3_small_x1_0(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.clas.MobileNetV3_small_x1_0(
+    num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/classification/resnet50_vd.py b/tutorials/train/classification/resnet50_vd.py
index 57b14f78..8950f9bb 100644
--- a/tutorials/train/classification/resnet50_vd.py
+++ b/tutorials/train/classification/resnet50_vd.py
@@ -70,7 +70,7 @@
 # 使用默认参数构建ResNet50-vd模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/classifier.py
-model = pdrs.tasks.ResNet50_vd(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.clas.ResNet50_vd(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/object_detection/faster_rcnn.py b/tutorials/train/object_detection/faster_rcnn.py
index ad2f668e..5a2a12a3 100644
--- a/tutorials/train/object_detection/faster_rcnn.py
+++ b/tutorials/train/object_detection/faster_rcnn.py
@@ -79,7 +79,7 @@
 # 构建Faster R-CNN模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/object_detector.py
-model = pdrs.tasks.FasterRCNN(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.det.FasterRCNN(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/object_detection/ppyolo.py b/tutorials/train/object_detection/ppyolo.py
index bdb8fe82..11d23fb6 100644
--- a/tutorials/train/object_detection/ppyolo.py
+++ b/tutorials/train/object_detection/ppyolo.py
@@ -80,7 +80,7 @@
 # 构建PP-YOLO模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/object_detector.py
-model = pdrs.tasks.PPYOLO(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.det.PPYOLO(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/object_detection/ppyolotiny.py b/tutorials/train/object_detection/ppyolotiny.py
index bbe20661..2daa1f5b 100644
--- a/tutorials/train/object_detection/ppyolotiny.py
+++ b/tutorials/train/object_detection/ppyolotiny.py
@@ -80,7 +80,7 @@
 # 构建PP-YOLO Tiny模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/object_detector.py
-model = pdrs.tasks.PPYOLOTiny(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.det.PPYOLOTiny(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/object_detection/ppyolov2.py b/tutorials/train/object_detection/ppyolov2.py
index 933a478f..11b5d3be 100644
--- a/tutorials/train/object_detection/ppyolov2.py
+++ b/tutorials/train/object_detection/ppyolov2.py
@@ -80,7 +80,7 @@
 # 构建PP-YOLOv2模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/object_detector.py
-model = pdrs.tasks.PPYOLOv2(num_classes=len(train_dataset.labels))
+model = pdrs.tasks.det.PPYOLOv2(num_classes=len(train_dataset.labels))
 
 # 执行模型训练
 model.train(
diff --git a/tutorials/train/object_detection/yolov3.py b/tutorials/train/object_detection/yolov3.py
index 79b2b744..68c6e071 100644
--- a/tutorials/train/object_detection/yolov3.py
+++ b/tutorials/train/object_detection/yolov3.py
@@ -80,7 +80,7 @@
 # 构建YOLOv3模型，使用DarkNet53作为backbone
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/object_detector.py
-model = pdrs.tasks.YOLOv3(
+model = pdrs.tasks.det.YOLOv3(
     num_classes=len(train_dataset.labels), backbone='DarkNet53')
 
 # 执行模型训练
diff --git a/tutorials/train/semantic_segmentation/data/.gitignore b/tutorials/train/semantic_segmentation/data/.gitignore
index 716e938a..79690465 100644
--- a/tutorials/train/semantic_segmentation/data/.gitignore
+++ b/tutorials/train/semantic_segmentation/data/.gitignore
@@ -1,4 +1,3 @@
 *.zip
 *.tar.gz
-rsseg/
-optic/
\ No newline at end of file
+rsseg/
\ No newline at end of file
diff --git a/tutorials/train/semantic_segmentation/deeplabv3p.py b/tutorials/train/semantic_segmentation/deeplabv3p.py
index ed99ec07..da929a27 100644
--- a/tutorials/train/semantic_segmentation/deeplabv3p.py
+++ b/tutorials/train/semantic_segmentation/deeplabv3p.py
@@ -72,7 +72,7 @@
 # 构建DeepLab V3+模型，使用ResNet-50作为backbone
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/segmenter.py
-model = pdrs.tasks.DeepLabV3P(
+model = pdrs.tasks.seg.DeepLabV3P(
     input_channel=NUM_BANDS,
     num_classes=len(train_dataset.labels),
     backbone='ResNet50_vd')
diff --git a/tutorials/train/semantic_segmentation/unet.py b/tutorials/train/semantic_segmentation/unet.py
index f938ff1f..cc0cb8e6 100644
--- a/tutorials/train/semantic_segmentation/unet.py
+++ b/tutorials/train/semantic_segmentation/unet.py
@@ -72,7 +72,7 @@
 # 构建UNet模型
 # 目前已支持的模型请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/docs/apis/model_zoo.md
 # 模型输入参数请参考：https://github.com/PaddlePaddle/PaddleRS/blob/develop/paddlers/tasks/segmenter.py
-model = pdrs.tasks.UNet(
+model = pdrs.tasks.seg.UNet(
     input_channel=NUM_BANDS, num_classes=len(train_dataset.labels))
 
 # 执行模型训练