Based on the daily observed rainfall dataset of 19 stations in Guizhou Province during 1980-2015, the spatio-temporal distribution features and the trend variation features of different precipitation day levels in different geomorphological types were investigated with methods of spline function interpolation and Mann-Kendall abrupt change test, combined with the calculation of climatic states, tendency rates, rainy day probability and linear coefficients. Results show that the average annual precipitation days of Guizhou Province was 171 days, which ranged from 130 to 200 days in different parts of this province. Light precipitation days made up 81.31% of the total precipitation days, so it determined the spatio-temporal distribution of the total precipitation days. The distribution of precipitation days showed remarkable regional characteristics, which increased from east to west and from north and south to central part. The spatial distribution of rainstorm and heavy precipitation days was in a strip pattern, which decreased from south to north. The moderate precipitation days had two centers of high values, which were located in the east and a karst basin of the southwest. It is also evident that the number of rainstorm and heavy precipitation days showed a slight upward trend, whereas the moderate precipitation days, light precipitation days and total number of precipitation days all showed the opposite, with the total precipitation days decreasing most significantly. The number of precipitation days was the highest in the karst gorge, but lowest in the non-karst and karst troughs. The maximum values of rainstorm, moderate and heavy precipitation days were in the karst basin, and the minimum values in the karst gorge. The number of precipitation days from March to August was greater than that from September to February, with the least number of precipitation days appearing in the winter, even less in the south. The annual distribution of total precipitation days were categorized into 3 types, which were gently, unimodal and bimodal type. Karst trough, non-karst and karst plateaus were all classified as gently type, peak clusters was unimodal type, karst gorge and karst basin were bimodal type. The numbers of light precipitation days and total precipitation days changed abruptly to a decreasing trend during 1997 to 1998，whereas the numbers of rainstorm, heavy and moderate precipitation days remained their courses.