Abstract: In order to promote the mechanization level of fertilization and ridging, and to solve the problem of poor fertilization effect in traditional fertilizer device, a tobacco fertilizing and ridging machine with reverse transfer fertilizer discharge is designed, and a fertilizer device with the functions of reverse transfer, fertilizer discharge control and barrier free fertilizer discharge is proposed. The whole structure of the tobacco fertilizing and ridging machine with reverse transfer fertilizer discharge and the design principles of reverse fertilizer discharging mechanism, fertilizer discharge driving mechanism and mixing linkage mechanism are introduced. The main structural parameters are determined. The results of fertilization and ridging test showed that the minimum accuracy of fertilization amount, ridge height, ridge base width and moisture surface width was 96.83%, 97.86%, 99.63% and 96.33%, respectively, and the variation coefficient was 2.47%, 1.31%, 0.19% and 0.93%, respectively. All operation indexes showed high accuracy and stability, and met the agronomic requirements. The designed tobacco fertilizing and ridging machine with reverse transfer fertilizer discharge effectively solves the problems of easy blockage, unsmooth fertilizer discharge and leakage in the fertilizer discharge path, and realizes the mechanization and integration of fertilization and ridging, thus improves the operation quality and efficiency. It has a good production and application prospect.