diff --git a/doc/doc_ch/add_new_algorithm.md b/doc/doc_ch/add_new_algorithm.md
index 37159c801a5ebc83c3b855a70ea772ba641e5297..f66e26b4c13ae19460c44d80b85eb253c2accfde 100644
--- a/doc/doc_ch/add_new_algorithm.md
+++ b/doc/doc_ch/add_new_algorithm.md
@@ -95,7 +95,7 @@ class MyBackbone(nn.Layer):
         self.conv = nn.xxxx
 
     def forward(self, inputs):
-        # your necwork forward
+        # your network forward
         y = self.conv(inputs)
         return y
 ```
@@ -300,4 +300,4 @@ Optimizer:
   regularizer:
     name: 'L2'
     factor: 0
-```
\ No newline at end of file
+```
diff --git a/doc/doc_en/add_new_algorithm_en.md b/doc/doc_en/add_new_algorithm_en.md
index 48b505b6994a99e66ce38ad2a59d47975534663b..dc81f1820f5d72a54f66fcddd716f18e5f6607e4 100644
--- a/doc/doc_en/add_new_algorithm_en.md
+++ b/doc/doc_en/add_new_algorithm_en.md
@@ -96,7 +96,7 @@ class MyBackbone(nn.Layer):
         self.conv = nn.xxxx
 
     def forward(self, inputs):
-        # your necwork forward
+        # your network forward
         y = self.conv(inputs)
         return y
 ```
@@ -301,4 +301,4 @@ Optimizer:
   regularizer:
     name: 'L2'
     factor: 0
-```
\ No newline at end of file
+```
diff --git a/ppocr/modeling/transforms/tps.py b/ppocr/modeling/transforms/tps.py
index e7a152c1ccbb1d0175f14f671041285cb853e11a..3de25193d6bf031c9cac2d026c5031ce4bb511fd 100644
--- a/ppocr/modeling/transforms/tps.py
+++ b/ppocr/modeling/transforms/tps.py
@@ -203,9 +203,9 @@ class GridGenerator(nn.Layer):
     def build_C_paddle(self):
         """ Return coordinates of fiducial points in I_r; C """
         F = self.F
-        ctrl_pts_x = paddle.linspace(-1.0, 1.0, int(F / 2))
-        ctrl_pts_y_top = -1 * paddle.ones([int(F / 2)])
-        ctrl_pts_y_bottom = paddle.ones([int(F / 2)])
+        ctrl_pts_x = paddle.linspace(-1.0, 1.0, int(F / 2), dtype='float64')
+        ctrl_pts_y_top = -1 * paddle.ones([int(F / 2)], dtype='float64')
+        ctrl_pts_y_bottom = paddle.ones([int(F / 2)], dtype='float64')
         ctrl_pts_top = paddle.stack([ctrl_pts_x, ctrl_pts_y_top], axis=1)
         ctrl_pts_bottom = paddle.stack([ctrl_pts_x, ctrl_pts_y_bottom], axis=1)
         C = paddle.concat([ctrl_pts_top, ctrl_pts_bottom], axis=0)
@@ -213,12 +213,16 @@ class GridGenerator(nn.Layer):
 
     def build_P_paddle(self, I_r_size):
         I_r_height, I_r_width = I_r_size
-        I_r_grid_x = (
-            paddle.arange(-I_r_width, I_r_width, 2).astype('float32') + 1.0
-        ) / I_r_width  # self.I_r_width
-        I_r_grid_y = (
-            paddle.arange(-I_r_height, I_r_height, 2).astype('float32') + 1.0
-        ) / I_r_height  # self.I_r_height
+        I_r_grid_x = paddle.divide(
+            paddle.arange(
+                -I_r_width, I_r_width, 2, dtype='float64') + 1.0,
+            paddle.to_tensor(
+                I_r_width, dtype='float64'))
+        I_r_grid_y = paddle.divide(
+            paddle.arange(
+                -I_r_height, I_r_height, 2, dtype='float64') + 1.0,
+            paddle.to_tensor(
+                I_r_height, dtype='float64'))  # self.I_r_height
         # P: self.I_r_width x self.I_r_height x 2
         P = paddle.stack(paddle.meshgrid(I_r_grid_x, I_r_grid_y), axis=2)
         P = paddle.transpose(P, perm=[1, 0, 2])
@@ -228,7 +232,7 @@ class GridGenerator(nn.Layer):
     def build_inv_delta_C_paddle(self, C):
         """ Return inv_delta_C which is needed to calculate T """
         F = self.F
-        hat_C = paddle.zeros((F, F), dtype='float32')  # F x F
+        hat_C = paddle.zeros((F, F), dtype='float64')  # F x F
         for i in range(0, F):
             for j in range(i, F):
                 if i == j:
@@ -241,13 +245,21 @@ class GridGenerator(nn.Layer):
         delta_C = paddle.concat(  # F+3 x F+3
             [
                 paddle.concat(
-                    [paddle.ones((F, 1)), C, hat_C], axis=1),  # F x F+3
+                    [paddle.ones(
+                        (F, 1), dtype='float64'), C, hat_C], axis=1),  # F x F+3
                 paddle.concat(
-                    [paddle.zeros((2, 3)), paddle.transpose(
-                        C, perm=[1, 0])],
+                    [
+                        paddle.zeros(
+                            (2, 3), dtype='float64'), paddle.transpose(
+                                C, perm=[1, 0])
+                    ],
                     axis=1),  # 2 x F+3
                 paddle.concat(
-                    [paddle.zeros((1, 3)), paddle.ones((1, F))],
+                    [
+                        paddle.zeros(
+                            (1, 3), dtype='float64'), paddle.ones(
+                                (1, F), dtype='float64')
+                    ],
                     axis=1)  # 1 x F+3
             ],
             axis=0)
@@ -268,7 +280,9 @@ class GridGenerator(nn.Layer):
         # rbf: n x F
         rbf = paddle.multiply(
             paddle.square(rbf_norm), paddle.log(rbf_norm + eps))
-        P_hat = paddle.concat([paddle.ones((n, 1)), P, rbf], axis=1)
+        P_hat = paddle.concat(
+            [paddle.ones(
+                (n, 1), dtype='float64'), P, rbf], axis=1)
         return P_hat  # n x F+3
 
     def get_expand_tensor(self, batch_C_prime):