The newly built Beijing-Xinjiang Expressway （G7） Yiwu-Mulei section located at the northern foot of the East Tianshan Mountains in Xinjiang. This expressway crosses many kinds of climatic regions such as the northern temperate continental arid zone， cold temperate sub arid zone， sub cold temperate sub arid zone and others. In the meantime， it passes through piedmont alluvial-proluvial plains， denudation-accumulation micro-hill areas， platforms， low-to-medium mountains in intermountain basins， and lacustrine sedimentary plain and other landform areas. Through the preliminary investigation on the complex meteorological conditions， various landforms and snow disasters， the results show that the main problem faced in the construction and operation of the project is the blowing snow disaster. Through various research methods such as remote monitoring of wind speed and direction， satellite remote sensing and in-situ snow investigation in winter， this paper discussed the characteristics of low snow density， variable wind direction， uneven distribution of wind speed and snowfall along the expressway are easy to cause blowing snow disasters， and points out the range of sections with strong wind force and heavy snowfall. Based on the fuzzy comprehensive evaluation method， an evaluation model of blowing snow hazard suitable for this expressway is established. In the model， eight natural and engineering influencing factors are considered and selected， and these influencing factors and risk evaluation indexes are formed into a membership function matrix. The blowing snow hazard is evaluated according to the principle of maximum membership， and the risk of blowing snow section in Yiwu to Mulei section of Beijing-Xinjiang Expressway （G7） is divided. The fuzzy evaluation results are in good agreement with the field snow investigation. Finally， in combination with the subgrade form in the most dangerous section of blowing snow， suggestions for adjusting or adding snow prevention facilities are given. The research results can provide theoretical guidance for the adoption of blowing snow prevention measures in Xinjiang section of Beijing-Xinjiang Expressway （G7）， and provide technical support for the dynamic adjustment and improvement of traffic safety facilities， which is of great significance for ensuring the safety of expressway operation in winter in cold regions and disaster prevention and reduction.
Keywords：expressway;blowing snow;fuzzy comprehensive evaluation;risk assessment;barrier;snow platform