Shortage in water resources is a serious problem in karst areas. Based on the daily precipitation data of five karst regions in Yunnan Province between 1959 and 2017,the precipitation changes in Yunnan karst area were systematically revealed using the trend analysis and Mann-Kendall non rank test. The results are as follows: Since 1959, the precipitation in the studied five karst regions in Yunnan Province shown a decreasing trend, and the decreases in central Yunnan and Southeast Yunnan were more obvious, but did not reach the 0.05 significant level. In recent years, the number of precipitation days in Yunnan karst area has shown a decreasing trend, of which the decrease trend of the western Yunnan, Central Yunnan and southeastern Yunnan was 0.05 confidence level, but the other areas were not obvious. The precipitation of small precipitation level in Yunnan karst area showed a decreasing trend, whereas the precipitation at heavy precipitation level shown an increasing trend. The variation of the longest drought time in the five karst regions of Yunnan has great regional differences. The longest consecutive dry days in Northwest Yunnan, western Yunnan, Northeast Yunnan and Southeast Yunnan shows an increasing trend, but in the Middle Yunnan, the trend of decreasing is significant. The average consecutive wet days decreased in all of the five karst regions of Yunnan, but the trend were not obvious except for the Northeast Yunnan.