Abstract: Based on the testing results of surface friction coefficient for high way in different meteorological conditions,main influencing factors of surface friction coefficient and its relationship with weather factors were analyzed in high way of Jilin province.The results showed that the weather change was the main factor to make the surface friction coefficient changed obviously in a short time.Surface frication meteorological index related to meteorological conditions was defined.Based on its influence to safety driving,surface frication meteorological index grades were established in high way of Jilin province.And a method of forecasting surface friction meteorological index was discussed according to weather conditions.