Abstract: The paper aims to analyze the variation characteristics of the gale days in southern Qinghai lake. Based on the data of the gale days from 1961 to 2017 in Gonghe Meteorological Bureau in southern Qinghai lake, we analyzed the inter- annual, decadal and seasonal change trends of the gale days by using linear tendency estimation, M-K mutation and sliding average method and so on. The results indicated that: (1) the gale days had a significant decline trend in southern Qinghai lake since 1961 with a rate of 2.0 d/10 a; (2) the gale days in spring, summer, autumn and winter were decreasing in Gonghe region, the magnitude of the decrease of the gale days was in the following order: spring>summer>autumn>winter; there was a significant decrease in gale days in spring and summer; (3) the mutation analysis showed that: the annual gale days had a mutation in 1975, and the gale days in the four seasons had no mutation. The study is valuable to the prevention and mitigation of climatic disasters, the reasonable utilization of climatic resources and the improvement of the environmental ecosystem.