Abstract: In this paper, the effects of mechanical operation parameters of corn subsoiling on crop yield and quality are discussed. The operation parameters of subsoiling machinery with different depths, different row spacings and different subsoiling frequencies were compared by field experiments. The results showed that the subsoiling machinery operation could significantly improve the yield and quality of maize. In terms of depth, the subsoiling operation with a depth of 30 cm had the best effect. In terms of row spacing, the subsoiling operation with a row spacing of 70 cm had the best effect. In terms of subsoiling frequency, the effect of subsoiling once every 3 years is the best. Therefore, it is suggested that in actual production, appropriate subsoiling mechanical operation parameters should be selected according to soil conditions and agricultural production characteristics to improve the yield and quality of maize.