The invention relates to a large-ridge platform kidney bean cultivation method, and belongs to the technical field of kidney bean cultivation. Soil preparation and ridging are performed in autumn, field ditches are arranged on the two sides of a ridge, a ridge platform is arranged on the ridge, the field ditches and the middle of the ridge platform are subjected to deep scarification, the land surface before ridging is adopted as the reference, the ridge deep scarification depth is 30-40 cm, and the deep scarification depth of the middle of the ridge is 15-30 cm; during soil preparation, the base fertilizer is applied to the middle of the ridge platform; the seed fertilizer is applied below the position of seed sowing; kidney bean seed sowing is performed on the ridge platform, seed sowing is performed on three rows, three seedling belts are formed, the seed sowing line spacing is 25-30 cm, the variety of kidney beans is erected or half-spreading type lodging-resistance high-yield kidney bean variety; the topdressing is applied to the outer sides of the seedling belts on the left and right sides of the ridge, and the topdressing is applied below the ridge platform. Due to the cultivation method of the combination of deep scarification, seed sowing and fertilizer application, the permeability is good, the stress resistance is strong, the production efficiency and fertilizer using efficiency of the kidney bean group photosynthesis are improved, and the high yield, high quality and efficient production can be achieved.