Abstract: In order to meet the demand of spring maize varieties in Heilongjiang Province,combining with the unique climate,soil and geographical conditions of Heilongjiang Province,the Maize Research Institute of Heilongjiang Academy of Agricultural Sciences crossed and bred a new excellent maize variety Jiangdan No.9 in2011 with self bred inbred line HRM8 as female parent and self bred inbred line HRU332 as male parent.This variety has many advantages such as high yield,strong disease resistance,strong stress resistance and good adaptability.In April 2018,it was approved by Heilongjiang Provincial Crop Variety Approval Committee（approval number:Heishenyu 2018007）,and is suitable for planting in the second accumulated temperature zone of Heilongjiang Province.