Abstract: In order to prepare the thunder and lightning protection and disaster reduction to provide scientific basis, to understand the climatic characteristics of thunderstorm in Yangquan City. The author utilized the thunderstorm observation data from the ground meteorological observatory in Yangquan nearly 40 years from 1971 to 2010, statistically analyzed the thunderstorm climate characteristic of Yangquan City by mathematical statistics, linear fitting, climate trend rate method, and wavelet analysis and so on. The results showed that: annual average days of the thunderstorm was 36.0 days, the year appearing thunderstorm most happened in 1973, while the year appearing least happened in 2004, the thunderstorm months in Yangquan City presented a parabolic unimodal change, its peak value happened in July, the average day of beginning thunderstorm on April 18th, while average for ending thunderstorm on September 28th in Yangquan the average duration of thunderstorms lasted 154 days, 80% guarantee appeared first and last day of thunderstorm in the middle of April and the middle of October. It was there was an obvious seasonal thunderstorm, summer most, winter no thunderstorms, concluded that the number of thunderstorm had a decreasing trend.