Abstract: In order to promote the popularization and application of a new earlymaturing maize variety Longfuyu20,this paper briefly introduced its breeding process,yield performance,characteristics,cultivation techniques and high-yield seed production techniques.Longfuyu 20 was bred from the hybrids combined by the Radiation Breeding?Department of Maize Research Institute of Heilongjiang Academy of Agricultural Sciences in 2014.Its female parent is the inbred line Fu 23,and its male parent is the inbred line Fu 99.This variety has the characteristics of early maturity,high yield,high quality and multi-resistances.In April 2020,it was approved by Heilongjiang Crop Variety Approval Committee（the approval number:Heishenyu 2020 L0023）.