Abstract: | Based on the daily precipitation data of 62 stations in Zhejiang Province from 1971 to 2018, the variation trend of precipitation of different grades was analyzed from the days and intensities of precipitation of different grades. The results show that the distribution of precipitation days in different grades in Zhejiang Province is mainly increasing from north to south; the total precipitation days in Zhejiang Province decrease at first and increase after 2009, while the precipitation intensity increases significantly, while the number of light rain days decreases mainly, the number of rainstorm days increases significantly after 1986, while the intensity of precipitation in different grades increases significantly. The proportion of light rain and moderate rain decreased significantly, and the proportion of heavy rain increased rapidly. |