Abstract: Based on the daily precipitation data of 245 weather stations in Northeast China from 1961 to 2019, the temporal and spatial characteristics of precipitation in early summer (June) and mid-summer (July and August) in Northeast China were analyzed using EOF, cumulative anomaly, moving t-test, Wavelet analysis, and correlation analysis methods. The results show that precipitation in mid-summer in Northeast China are mainly concentrated in the southeast, and more precipitation is distributed in the north and northeast in early summer. The first and fourth modes of EOF in early and mid-summer are consistent across the whole area and feature a change of negative-positive-negative (positive-negative-positive) from north to south, respectively. There are two abrupt changes of precipitation in early summer in 1972 and 1995 and three abrupt changes in mid-summer precipitation in 1966, 1983, and 1998, respectively. There are prominent quasi-6-year and quasi-3-year oscillation periods in mid-summer precipitation in northeast China from the 1980s to 1990s and late 1990s, respectively. The main oscillation period of midsummer precipitation is about 12 years, and the interannual scale oscillation period for 3-4 years appears after the 1990s. With investigating the characteristics of circulation field related to precipitation on time division, it is found that the influence of Northeast Cold Vortex on the precipitation in early summer is enhanced, and the impact factors of precipitation in mid-summer transforms from the Western Pacific subtropical high to the mid-latitude westerlies system, indicating a new characteristic.