Based on the observation data of meteorological stations and meteorological related of transmission lines accident from 2016-2021 in Tianjin, the distribution characteristics of transmission lines accident in three types of transmission lines was found. And analyzes the characteristics of transmission lines accident by calculating the failure rate for different meteorological level, average outage time and the overlap rate. The results show that the meteorological risk of transmission lines in Tianjin mainly caused by strong wind, lightning and snow disasters. Of the accident rate, the lightning (wind) is the highest (low), and decreasing with the ability of transmission; Of the average outage time, ice cover caused the longest average outage time, followed by wind damage, and the shortest lightning time. The impact of meteorological disasters on the three types of transmission lines is basically 35kV> 110kV> 220kV. Based on this, a comprehensive risk assessment method for transmission line considering multiple meteorological factors is introduced. The method was applied to a case in Tianjin and verified its effectiveness