diff --git a/ppocr/data/imaug/fce_aug.py b/ppocr/data/imaug/fce_aug.py
index 7ef00de33bad3076d5b6d585cb9aa14df17a015d..66bafef13caaaa958c89f865bde04cb25f031329 100644
--- a/ppocr/data/imaug/fce_aug.py
+++ b/ppocr/data/imaug/fce_aug.py
@@ -133,7 +133,7 @@ class RandomCropFlip:
             fail_flag = False
             for polygon, ignore_tag in zip(polygons, ignore_tags):
                 ppi = Polygon(polygon.reshape(-1, 2))
-                ppiou, _ = poly_intersection(ppi, pp)
+                ppiou, _ = poly_intersection(ppi, pp, buffer=0)
                 if np.abs(ppiou - float(ppi.area)) > self.epsilon and \
                         np.abs(ppiou) > self.epsilon:
                     fail_flag = True
diff --git a/ppocr/utils/poly_nms.py b/ppocr/utils/poly_nms.py
index 31eb6642aca1c29ab937ada7c044d51f922c7730..9dcb3d2c2f7be2022529d5e54de357182f207cf5 100644
--- a/ppocr/utils/poly_nms.py
+++ b/ppocr/utils/poly_nms.py
@@ -36,7 +36,7 @@ def points2polygon(points):
     return Polygon(point_mat)
 
 
-def poly_intersection(poly_det, poly_gt):
+def poly_intersection(poly_det, poly_gt, buffer=0.0001):
     """Calculate the intersection area between two polygon.
 
     Args:
@@ -49,7 +49,10 @@ def poly_intersection(poly_det, poly_gt):
     assert isinstance(poly_det, Polygon)
     assert isinstance(poly_gt, Polygon)
 
-    poly_inter = poly_det.buffer(0.001) & poly_gt.buffer(0.001)
+    if buffer == 0:
+        poly_inter = poly_det & poly_gt
+    else:
+        poly_inter = poly_det.buffer(buffer) & poly_gt.buffer(buffer)
     return poly_inter.area, poly_inter