The most important high-impact weather of road traffic safety in Qianxinan is freezing (road icing),fog and heavy rainfall.Because of the special mountain structure in Qianxinan,the meteorological conditions are complex and the meteorological factors are greatly affected by altitude,longitude and latitude.Based on the historical meteorological data,the spatial and temporal distributions of frost (road icing),fog and heavy precipitation in Qianxinan are analyzed by using the multivariate regression residual correction interpolation.Based on the relationship between image condition and traffic safety, a high impact weather zoning map of road traffic safety in Qianxinan is obtained.The results show that the influence of frozen weather on traffic safety mainly varies with altitude,of which Pu"an,Xingren, north-central Anlong,most of Qinglong,northeast of Wangmo,and high altitude of Xingyi are the heavily damaged areas;the influence of foggy weather mainly varies with latitude;Qinglong and Pu"an are the heavily damaged areas;heavy rainfall mainly affects Qinglong.Pu’an, Xingyi and Wangmo.