The Northeast China Cold Vortex (NCCV) is a significant circulation system affecting the weather and climate in the northeastern China (NEC). On the basis of previous studies, the identification and tracking method of NCCVs is constructed in this study. 2000-2019 NCEP/NCAR reanalysis data are used to objectively identify and track NCCVs. On this basis, the temporal and spatial distribution characteristics, duration, intensity and size of NCCVs are analyzed, and the relationship between NCCVs and precipitation in the warm season in the NEC are also discussed by using the hourly precipitation observation data offered by 216 national automatic weather stations (AWSs). NCCVs in the NEC have no obvious long-time trend, but have a considerable interannual variability and a clear seasonal variation, which are more likely to occur in the warm season. The duration of NCCVs is generally 48-72 hours and the size range mainly distributes in 600-1200 km. The mean size and intensity of NCCVs in the cold season are both larger than those in the warm season. The high occurrence of NCCVs presents an east-west zonal distribution along the latitude of 45-55°N. The contribution of NCCVs to the precipitation in the warm season in NEC is generally over 20%. For the precipitation in four classes of 0.1-5 mm/h, 5-10 mm/h, 10-20 mm/h and ≥20 mm/h, the spatial distributions of precipitation proportion are different and the local characteristic of heavy precipitation is remarkable. The maximum contribution of NCCVs to the rainstorm can reach more than 70%.