diff --git a/python/paddle/fluid/contrib/mixed_precision/decorator.py b/python/paddle/fluid/contrib/mixed_precision/decorator.py
index bf3d60ae45c8cf0a1e8353603941287fa298b4f9..bfbd2700ae10bac4ad37462b5d7844b90dd05bbe 100644
--- a/python/paddle/fluid/contrib/mixed_precision/decorator.py
+++ b/python/paddle/fluid/contrib/mixed_precision/decorator.py
@@ -217,7 +217,7 @@ class OptimizerWithMixedPrecision(object):
 
 def decorate(optimizer,
              amp_lists=None,
-             init_loss_scaling=1.0,
+             init_loss_scaling=2**15,
              incr_every_n_steps=1000,
              decr_every_n_nan_or_inf=2,
              incr_ratio=2.0,