diff --git a/paddle/fluid/pybind/protobuf.cc b/paddle/fluid/pybind/protobuf.cc
index cbc83106fc36d3e03a05d1172b4574c09178435b..d3b0d4a22954c1d67dc9551b997dcffa0625cbeb 100644
--- a/paddle/fluid/pybind/protobuf.cc
+++ b/paddle/fluid/pybind/protobuf.cc
@@ -57,6 +57,18 @@ struct variant_caster<V<Ts...>> {
     auto caster = make_caster<T>();
     if (!load_success_ && caster.load(src, convert)) {
       load_success_ = true;
+
+      if (std::is_same<T, std::vector<float>>::value) {
+        auto caster_ints = make_caster<std::vector<int64_t>>();
+        if (caster_ints.load(src, convert)) {
+          VLOG(4) << "This value are floats and int64_ts satisfy "
+                     "simultaneously, will set it's type to "
+                     "std::vector<int64_t>";
+          value = cast_op<std::vector<int64_t>>(caster_ints);
+          return true;
+        }
+      }
+
       value = cast_op<T>(caster);
       return true;
     }