The non-uniform distribution of precipitation is the main cause of disasters such as drought and flood.Precipitation Concentration Period (PCP) and Precipitation Concentration Degree (PCD)can quantitatively describe the spatial and temporal distribution characteristics of precipitation inhomogeneity. Based on the daily precipitation data of 18 meteorological stations from 1971 to 2017 around the Taihu Lake Basin,the spatial and temporal change characteristics of the annual precipitation,precipitation days,PCD and PCP were analyzed by methods of linear regression and coefficient of variation. Results show that annual precipitation was in a significant increasing trend in the past 47 years,and the annual precipitation days was in a significant decreasing trend. The decreasing trend of precipitation in spring is obvious,which is easy to lead to spring drought. The number of precipitation days increased significantly in summer and autumn,increasing the risk of flooding. PCD and PCP had trends of slowly increasing. The PCD increased from the southeast to the northwest. The PCP in the southwest area was earlier than that in the northeast area. Both PCD and PCP increased in the north region and decreased in the south region. It was found that there was a positive relationship between PCD,PCP and the amount of annual precipitation in space,that is to say,the more (less) annual precipitation was,the bigger (smaller) the PCD was,PCP presented a trend of later (earlier) accordingly. The topography had a significant effect on precipitation around the Taihu Lake Basin,it showed that the amount of annual precipitation and precipitation days were more in high-altitudeareas.