Abstract: There is a close relationship between weather condition and traffic accident.Based on the traffic accident data and related meteorological data of Nanchong in 2010~2018 to explore the specific impact of different meteorological conditions on drivers,vehicles,road environment.The statistical analysis of the interannual and inter-monthly,daily changes of the traffic accidents in the area under the jurisdiction of Nanchong and the characteristics of meteorological element at the time of the accident occurred,and their correlation.The results show that in recent years,traffic accidents have shown a trend of decreasing year by year,the main flood season from May to August and winter are the period of high traffic accident in Nanchong.Less traffic accidents occur in March to April and September to November.Traffic accident has obvious characteristics of daily variation,for example,7~8am,11~12am,2~3pm and 6~7pm are the high period of traffic accident.Traffic accident has a certain correlation with weather conditions,especially high temperature,rainfall,fog and other weather phenomena; in addition,under different weather conditions,targeted measures can be taken to effectively avoid traffic accidents.