Abstract: Based on the month-by-month precipitation raster dataset of the Huaihe River Basin from 1901 to 2020, the temporal and spatial pattern of precipitation changes in the Huaihe River Basin over the past 120 years was analyzed by using the Mann-Kendall test, Morlet wavelet analysis and precipitation concentration. The results showed that: (1) In terms of temporal changes, the annual and four-seasonal precipitation in the Huaihe River Basin from 1901 to 2020 show a non-significant upward trend with high abruptness, and there were the first main cycles of 64 a (year), 8 a (spring), 61 a (summer), 17 a (fall) and 32 a (winter), respectively. (2) In terms of spatial changes, the annual, spring, autumn and winter precipitation in the Huaihe River Basin decreased gradually from south to north, while the summer precipitation showed a “high-low-high”distribution from southwest to northeast, with the Dabie Mountain area and the Shandong Peninsula as the high-value and low-value areas of precipitation in the basin, respectively. The concentration of precipitation in the year and in the four seasons was generally high in the north and low in the south, and the concentration of precipitation was high in the north and low in the south. The annual and four-seasonal precipitation concentration was characterized by the distribution of high in the north and low in the south, in which the SPCI values of the four-seasonal precipitation were less than 15, and the distribution of seasonal precipitation was relatively uniform.The results of the M-K trend test showed that the annual and four-seasonal precipitation in most areas of the Huaihe River Basin showed a weak growth trend.