diff --git a/python/akg/ms/gpu/cast.py b/python/akg/ms/gpu/cast.py
index 0478a20f94a1d16709617f70aea313cab0daf735..71bd2a0b3f47e42dd7bd40b8af07f589240bb91b 100644
--- a/python/akg/ms/gpu/cast.py
+++ b/python/akg/ms/gpu/cast.py
@@ -22,4 +22,6 @@ def Cast(x, dst_type):
     """cast."""
     if x.dtype == "int64" and dst_type == "float16":
         x = cast.cast(x, "float32")
+    if x.dtype == "float16" and dst_type == "int32":
+        x = topi.trunc(x)
     return cast.cast(x, dst_type)