Abstract: L9(3^4) orthogonal design was used to research the effect of potato varieties, the spacing and bandwidth of potato and corn, the distance between the potatoes on the production of potatoes and corn. The research showed that potato varieties and bandwidth were the key factors for the total production, followed by potato nest distance, the spacing of potato and corn had the smallest effect. The total production achieved the highest(30 981.4 kg/hm2) when the potato variety was chongqing potato 1, the potato nest distance was 40 cm, the spacing was 20 cm and the bandwidth was 120 cm.