The study aims to analyze the variation characteristics of extreme weather events at the junction of China northeast plain and mountain under the background of global warming. Based on the homogeneous daily extreme maximum and extreme minimum temperature data in Benxi City, the climatic character and change of its extreme minimum temperature and extreme maximum temperature in 1955-2013 were analyzed by using the correlation coefficient method and contrast analysis method. The result showed that the extreme maximum temperature was 37.5℃ in Benxi City, and extreme minimum temperature was - 34.5℃。Its annual range of extreme temperature was large, with the highest of 70.6℃ and the lowest of 51.6℃. The annual extreme maximum temperature occurred in May, June, July, August and September, and mostly in August, the annual extreme minimum temperature occurred in December, January and February. The daily lowest temperature occurred at 4:00- 7:00, and the daily highest temperature occurred at 14:00- 16:00. Overall, Benxi City was warming, the extreme maximum temperature had no obvious change and the extreme minimum temperature showed an upward trend, annual temperature range was the narrowing, but the change was not significant.