This paper numerically simulated the soil cutting process of plane blade, one of the important components in no-till working implement, by ANSYS/LS_DYNA, with soil of conservation tillage in one year two crops area of North China. By theoretical analysis and test, the viability of SPH method on simulating the soil cutting process of plane blade was verified. By using MAT147 soil material model, SPH method and nodes-surface eroding contact, the finite element analysis on the soil cutting process of plane blade was implemented by ANSYS/LS_DYNA. Simulation result showed that SPH method could visually simulate the soil cutting process. The maximum Von Mises stress was 5.851MPa and focused on the soil touching with plane blade. The Von Mises stress of soil had small fluctuation, so that the cutting was stable. The power consumption was approximately 10.2kW at steady state, and the simulation error was not more than 0.05. It was proved that SPH method was viable, and finite element simulation could obtain parameters easily, such as scatter feature, force and power consumption, and reduce experimental cost and time. It provided a scientific basis for design optimization of conservation tillage anti-blocking implements.