The new maize variety "Xianfeng 9" with stable and high yield as well high quality was bred by genealogical method in 2014 by Wheat Research Institute of Shanxi Agricultural University（Shanxi Academy of Agricultural Sciences）. The maternal parent and male parent were X460 and X433, respectively. The regional test results in middle and late cropping area of spring maize in Shanxi Province showed that, the maize yield in all sites increased both in 2018 and 2019 with an average yield of 13 207.3 kg/ha, which was 7.7% higher than the control "Xianyu 335". In 2020, the production test results in middle and late cropping area of spring maize in Shanxi Province showed that, and the increased proportion of test sites compared with the control was 100%, with an average yield of 12 685.5 kg/ha and an increase of 5.3%. In the same year, the grain was determined as, 774 g/L of bulk weight,9.7% of crude protein, 3.65% of crude fat, and 75.74% of crude starch. In 2021, it was approved by Shanxi Provincial Main Crop Variety Approval Committee, and the approval number was Jinshenyu 20210019, which was suitable for planting in middle and late cropping area of spring maize in Shanxi Province.