Based on precipitation data from 58 rainfall stations in Wenzhou City from 1970 to 2020, the spatio-temporal evolution of nine extreme precipitation indices at different altitudes was analyzed by using the methods of moving averages, Mann-Kendall trend test, inverse distance weight, and Spearman’s rank correlation test, and attribution analysis of changes in the indices was carried out. The results show that there is a positive correlation between extreme precipitation indices and altitude,which is that the extreme precipitation indices increase with altitude. The extreme precipitation indices, such as annual precipitation, extreme precipitation and 1-day maximum precipitation, all showed different degrees of increasing trends with time. The indices of extreme precipitation, frequency of extreme precipitation and number of days of precipitation decrease from west to east in the spatial distribution of Wenzhou City. Extreme precipitation thresholds vary significantly in space.