Abstract: In order to promote the popularization and application of the new maize variety Fumin 105 with high yield, high quality and saline-alkali resistance, the selection process, characteristics, cultivation techniques and the screening of suitable saline-alkali stress concentration were introduced in this paper. Fumin 105 is a middle and late maize hybrid bred by Jilin Fumin Seed Industry Co., Ltd. with Fm1101 as the mother and F1 as the father. From 2017 to 2018, Fumin 105 participated in the regional experiment of high density group in Jilin Province, and the average yield of the two-year regional experiment was 12 674.9 kg·ha^-1, which was 3.9% higher than that of Xianyu 335, the control variety. In 2018, it participated in the production test of high density group in Jilin Province. The average yield of the production test in 2018 was 11 941.7 kg·ha^-1, which was 5.1% higher than that of the control variety Xianyu 335, showing a significant increase in yield. In the simulated stress environment of 0, 50, 100, 150 and 200 mmol·L^-1 Na₂CO₃ solution, the salt damage of maize varieties at seedling stage under Na₂CO₃ stress was compared. It was found that Fumin 105 leaves had better green retention and stronger salt-alkali tolerance than Xianyu 335 leaves under 100 mmol·L^-1 Na₂CO₃ solution. In 2018, it was approved by the Jilin Provincial Crop Variety Certification Committee, and the certification number is Jishenyu 20190027. This variety has the characteristics of high yield, high quality, suitable ripening stage, strong disease resistance, wide adaptability and salt-alkali tolerance.