Soil cultivation, the part and parcel of crop farming, can provide a good peripheral environment for tobacco growth. In order to solve the problems of traditional soil cultivation's operation, including the lack of centralized throwing soil and the poor effect of fixed-point covering soil at tobacco fields in southern China. The soil-banking machine with centralized soil feeding and double-sided lateral delivery was designed for tobacco based on the mode of breaking up the soil after rotary tilling, centralizing throwing soil and soil lateral delivery. The soil engaging component was researched and the process about centralized soil throwing and lateral delivery on the basis of the theory of soil milling and soil auger conveying was analyzed, and the main structure and operation parameters of the equipment was confirmed. Based on the EDEM discrete element simulation technology, a component-soil simulation model was established. The forward speed, rotary tillage depth, and rotation speed of the auger shaft were the test factors. The soil height, soil width, and soil fetching rate were used as test indicators, and the simulated quadratic orthogonal rotation regression test was carried out. Field experiments were conducted on the basis of simulation. On the basis of simulation test values, the test factors were optimized and analyzed. It illuminated that when the forward speed was 0.4m/s, the rotary tillage depth was 60mm and rotation speed of the auger shaft was 339r/min, and the soil height was 27.76mm, the soil width was 132.94mm, and the soil fetching rate was 23.66%. The field test results showed that the soil at the trench was loosened and cultivated soil working was stable, and its soil height was 24.37mm, soil width was 130.42mm, and soil fetching rate was 21.19%. The deviation of the test index was respectively 12.21%, 1.90% and 10.44%, and the research result would provide a way to strengthen integration of agricultural machinery and agronomy about tobacco soil cultivation technology.