Abstract: In order to verify throwing soil performance of IT260 rotary blade of sweet potato ridger，simulation experiment was carried out in EDEM discrete element software，and simulation data was compared with theoretical data.Results showed that average throwing amount of soil was 153.37 kg when forward speed of IT260 rotary blade was 1.54 m/s，rotation speed was 330 r/min，and tillage depth was 0.12 m，which could meet soil requirement for ridging.The three-dimensional model established can provide a reference for research and design of rotary blade of sweet potato ridger in the future.