diff --git a/paddlepalm/distribute/reader.py b/paddlepalm/distribute/reader.py
index 7ddafb4ac8038f22385aa102af8fc086646bcf59..062c7c9472a0dad7b2059187d74cacc1808a528b 100644
--- a/paddlepalm/distribute/reader.py
+++ b/paddlepalm/distribute/reader.py
@@ -125,6 +125,6 @@ def decode_fake(nums, mask, bs):
 
     n_f = len(mask) - n_t
     p1 = nums - (n_t-1) * bs
-    each_f = p1 / (n_f+1)
+    each_f = p1 // (n_f+1)
     return each_f * n_f