Abstract:Analyzing the temporal and spatial trends of climate change in Guizhou Province is of great significance for planning ecotourism development, environmental protection and disaster prevention in the region. Based on the monthly precipitation data from 17 sites in Guizhou Province during 1960 to 2018, methods of linear regression,moving average, ordered clustering, Mann—Kendall mutation test, and inverse distance weight interpolation were applied to analyze spatial and temporal characteristic of precipitation in Guizhou. The study showed that: In the past 59 years, Guizhou had a downward trend in precipitation, with a precipitation coefficient of -0.102. Although the annual precipitation in Karst valleys and non-karst areas was increasing, the trend was not significant. While other areas (karst troughs, peak-cluster depressions, Karst Plateau, and karst basins) showed all downtrend of precipitation, and the karst basin’s deceleration rate was -37.57 mm/10 a, which downtrend was the most significant, and it was 1.37~2.25 times of the other three regions. The annual precipitation descended at a rate of -16.50 mm/10 a, and annual precipitation tended to decrease from northeast to southwest in the space. The increase of precipitation in autumn and winter contributed the most to annual precipitation, while in spring and summer the precipitation showed a downtrend. Meanwhile the annual precipitation days and the maximum daily precipitation also showed a decreasing trend, the latter trend was most obvious after the 1980s so that the average maximum daily precipitation decreased to about 1/10 of that in the 1960s. In addition, the annual precipitation in non-karst areas and Karst Plateau changed abruptly from 1985 to 1986, and in karst basins the annual precipitation had a change in 2001 abruptly. There was no abrupt change in the annual precipitation in Karst troughs and peak-cluster depressions and Karst valleys.