Abstract: In order to make full use of the land resources, increase the output value per unit area and peasants＇ income and to obtain the highest grain yields with maximum economic benefits, the intereropping patterns of red kidney bean - patato was investigated in this study. The significant differences of compound yield of red kidney bean and patato between varied intercropping patterns were observed. The highest economic benefit was obtained when red kidney bean and potato were intereropped in the pattern of 2：2, with the yield of 79.6 kg/667m^2 and 1 126.3 kg/667m^2 respectively and the output value of 961.2 CNY/667m^2.