Abstract: The paper aims to provide scientific theoretical basis for lightning protection and disaster reduction. Using the thunderstorm data from 1963 to 2012 in Fuxin Mongolian Autonomous County, with its geographical environment and climate characteristics as the background, the climatic characteristics of thunderstorms were analyzed with methods such as mathematical statistics, linear fitting, climate trend rate and Morlet wavelet analysis. The results showed that: annual average days of thunderstorm were 29.04 days in the recent 50 years, which was in the moderate thunderstorm range. The inter-annual variability of thunderstorm day was large, the years that had the most thunderstorm days were 1991 and 2005, while the year that had the least thunderstorm days was 2010, the former was more than twice the latter. The number of thunderstorm in 50 years had a gradually decreasing trend, with the climate tendency decreasing rate of 0.852 d/10 a. The thunderstorm days were mostly concentrated in May to September, which had a number of 1337 thunderstorm days in the recent 50 years, accounting for 92.08% of the thunderstorm days all the year round. There was an obvious seasonal variation in thunderstorm occurrence, with the most in summer and the least in winter. Using wavelet analysis method, it showed that the thunderstorm activities had strong vibration cycle of 17 years and 2 to 6 years in the studied area.