Mianxi Expressway (S32) is a provincial expressway built and opened to traffic during the 13th Five-Year Plan period of Sichuan Province. It connects Mianyang city and Nanchong City, two important regional central cities in Chengdu-Chongqing metropolitan circle, and connects five expressways along the highway, which is an important traffic lifeline in eastern and northern Sichuan. This paper analyzed and sorted out traffic control ledger data, meteorological observation station data along the way, major traffic accident data and NCEP1°×1°reanalysis of upper-air data by visiting and investigating front-line operation and management personnel and searching historical data, and it summarized the road control situation of Mianxi expressway, the distribution of traffic control characteristics under the direct influence of disastrous weather, the analysis of main meteorological disaster risk regionalization and the main meteorological disaster risk early warning index.