diff --git a/apps/iot/src/influxdb/influx_point.erl b/apps/iot/src/influxdb/influx_point.erl
index 0bb8ed7..80851b0 100644
--- a/apps/iot/src/influxdb/influx_point.erl
+++ b/apps/iot/src/influxdb/influx_point.erl
@@ -37,7 +37,7 @@ normalized(#point{measurement = Name, tags = Tags, fields = Fields, time = Time}
     erlang:iolist_to_binary([TagItems, <<" ">>, FieldItems, <<" ">>, integer_to_binary(NTime)]).
 
 field_val(V) when is_integer(V) ->
-    <<(integer_to_binary(V))/binary, "i">>;
+    integer_to_binary(V);
 field_val(V) when is_float(V) ->
     %% 默认按照浮点数表示
     iot_util:float_to_binary(V, 6);