diff --git a/ppocr/losses/distillation_loss.py b/ppocr/losses/distillation_loss.py
index 1e8aa0d8..1c5d8a2b 100644
--- a/ppocr/losses/distillation_loss.py
+++ b/ppocr/losses/distillation_loss.py
@@ -18,19 +18,60 @@ import paddle.nn as nn
 from .rec_ctc_loss import CTCLoss
 from .basic_loss import DMLLoss
 from .basic_loss import DistanceLoss
+from .det_db_loss import DBLoss
+from .det_basic_loss import BalanceLoss, MaskL1Loss, DiceLoss
 
 
-class DistillationDMLLoss(DMLLoss):
+def _sum_loss(loss_dict):
+    if "loss" in loss_dict.keys():
+        return loss_dict
+    else:
+        loss_dict["loss"] = 0.
+        for k, value in loss_dict.items():
+            if k == "loss":
+                continue
+            else:
+                loss_dict["loss"] += value
+        return loss_dict
+
+# class DistillationDMLLoss(DMLLoss):
     """
     """
 
-    def __init__(self, model_name_pairs=[], act=None, key=None,
+    def __init__(self,
+                 model_name_pairs=[],
+                 act=None,
+                 key=None,
+                 maps_name=None,
                  name="loss_dml"):
         super().__init__(act=act)
         assert isinstance(model_name_pairs, list)
         self.key = key
         self.model_name_pairs = model_name_pairs
         self.name = name
+        self.maps_name = self.maps_name
+
+    def _check_maps_name(self, maps_name):
+        if maps_name is None:
+            return None
+        elif type(maps_name) == str:
+            return [maps_name]
+        elif type(maps_name) == list:
+            return [maps_name]
+        else:
+            return None
+
+    def _slice_out(self, outs):
+        new_outs = {}
+        for k in self.maps_name:
+            if k == "thrink_maps":
+                new_outs[k] = paddle.slice(outs, axes=1, starts=0, ends=1)
+            elif k == "threshold_maps":
+                new_outs[k] = paddle.slice(outs, axes=1, starts=1, ends=2)
+            elif k == "binary_maps":
+                new_outs[k] = paddle.slice(outs, axes=1, starts=2, ends=3)
+            else:
+                continue
 
     def forward(self, predicts, batch):
         loss_dict = dict()
@@ -40,13 +81,30 @@ class DistillationDMLLoss(DMLLoss):
             if self.key is not None:
                 out1 = out1[self.key]
                 out2 = out2[self.key]
-            loss = super().forward(out1, out2)
-            if isinstance(loss, dict):
-                for key in loss:
-                    loss_dict["{}_{}_{}_{}".format(key, pair[0], pair[1],
-                                                   idx)] = loss[key]
+
+            if self.maps_name is None:
+                loss = super().forward(out1, out2)
+                if isinstance(loss, dict):
+                    for key in loss:
+                        loss_dict["{}_{}_{}_{}".format(key, pair[0], pair[1],
+                                                       idx)] = loss[key]
+                else:
+                    loss_dict["{}_{}".format(self.name, idx)] = loss
             else:
-                loss_dict["{}_{}".format(self.name, idx)] = loss
+                outs1 = self._slice_out(out1)
+                outs2 = self._slice_out(out2)
+                for k in outs1.keys():
+                    loss = super().forward(outs1[k], outs2[k])
+                    if isinstance(loss, dict):
+                        for key in loss:
+                            loss_dict["{}_{}_{}_{}_{}".format(key, pair[
+                                0], pair[1], map_name, idx)] = loss[key]
+                    else:
+                        loss_dict["{}_{}_{}".format(self.name, map_name,
+                                                    idx)] = loss
+
+        loss_dict = _sum_loss(loss_dict)
+
         return loss_dict
 
 
@@ -73,6 +131,93 @@ class DistillationCTCLoss(CTCLoss):
         return loss_dict
 
 
+"""
+class DistillationDBLoss(DBLoss):
+    def __init__(self,
+                 model_name_list=[],
+                 balance_loss=True,
+                 main_loss_type='DiceLoss',
+                 alpha=5,
+                 beta=10,
+                 ohem_ratio=3,
+                 eps=1e-6,
+                 name="db_loss",
+                 **kwargs):
+        super().__init__()
+        self.model_name_list = model_name_list
+        self.name = name
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, model_name in enumerate(self.model_name_list):
+            out = predicts[model_name]
+            if self.key is not None:
+                out = out[self.key]
+
+            loss = super().forward(out, batch)
+
+            if isinstance(loss, dict):
+                for key in loss.keys():
+                    if key == "loss":
+                        continue
+                    loss_dict[f"{self.name}_{model_name}_{key}"] = loss[key]
+            else:
+                loss_dict[f"{self.name}_{model_name}"] = loss
+
+        loss_dict = _sum_loss(loss_dict)
+        return loss_dict
+
+
+class DistillationDilaDBLoss(DBLoss):
+    def __init__(self, model_name_pairs=[],
+                 balance_loss=True,
+                 main_loss_type='DiceLoss',
+                 alpha=5,
+                 beta=10,
+                 ohem_ratio=3,
+                 eps=1e-6,
+                 name="dila_dbloss"):
+        super().__init__()
+        self.model_name_pairs = model_name_pairs
+        self.name = name
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, pair in enumerate(self.model_name_pairs):
+            stu_outs = predicts[pair[0]]
+            tch_outs = predicts[pair[1]]
+            if self.key is not None:
+                stu_preds = stu_outs[self.key]
+                tch_preds = tch_outs[self.key]
+            
+            stu_shrink_maps = stu_preds[:, 0, :, :]
+            stu_binary_maps = stu_preds[:, 2, :, :]
+
+            # dilation to teacher prediction
+            dilation_w = np.array([[1,1], [1,1]])
+            th_shrink_maps = tch_preds[:, 0, :, :] 
+            th_shrink_maps = th_shrink_maps.numpy() > 0.3 # thresh = 0.3 
+            dilate_maps = np.zeros_like(th_shrink_maps).astype(np.float32)
+            for i in range(th_shrink_maps.shape[0]):
+                dilate_maps[i] = cv2.dilate(th_shrink_maps[i, :, :].astype(np.uint8), dilation_w)
+            th_shrink_maps = paddle.to_tensor(dilate_maps)
+
+            label_threshold_map, label_threshold_mask, label_shrink_map, label_shrink_mask = batch[1:]
+            
+            # calculate the shrink map loss
+            bce_loss = self.alpha * self.bce_loss(stu_shrink_maps, th_shrink_maps,
+                                         label_shrink_mask)
+            loss_binary_maps = self.dice_loss(stu_binary_maps, th_shrink_maps,
+                                            label_shrink_mask)
+            
+            k = f"{self.name}_{pair[0]}_{pair[1]}"
+            loss_dict[k] = bce_loss + loss_binary_maps
+        
+        loss_dict = _sum_loss(loss_dict)
+        return loss
+"""
+
+
 class DistillationDistanceLoss(DistanceLoss):
     """
     """