The subsoiler is mainly used for soil subsoiling, breaking the bottom layer, deepening the ploughing layer, improving the ploughing layer structure, improving the soil water storage and moisture retention, and the ability to resist drought and waterlogging. It is suitable for farming in arid, semi-arid and hilly areas. Deep loosening increases the pores in the deep soil, and the proportion of the three phases (solid, liquid, and gas) is properly adjusted, which has the functions of increasing temperature, preventing cold and slowing down soil erosion and wind erosion. The soils that were once barren and not suitable for deep ploughing, such as saline-alkali soil, white mud soil, loess, etc. Combined with fertilization, subsoiling can improve the soil.