Abstract: The experiment were conducted to study the effects of mechanized subsoiling and rotary tillage cultivation technology on topsoil water,bulk density,leaf area index,dry matter accumulation,yield and yield factors.The results showed that the effect of subsoiling technology is superior to shallow tillage.Subsoiling could increase soil water more than rotary tillage before maize seeding and after harvest.The soil bulk density of subsoiling was significantly lower than shallow tillage in15~35 cm except 0~15 cm soil layer.In corn jointing stage,silking stage and the milk stage,compared with the shallow tillage,the root dry weight in 0~40 cm soil layer,aboveground dry matter weight,leaf area index in subsoiling were increased.Subsoiling effectively disrupted the plough pan and improving capacity of water storage,water retention in soil.Subsoiling could prompt the root growth and increase the absorptive capacity of maize roots,and thus thick with leaves and deep-rooted,root cap coordination,which increased of 14.40%hundred grain weight,the yield increase of more than 9.07%shallow tillage.