The invention provides a planting method for rich production of pachyrhizua angulatus and relates to the technical field of food planting. The planting method comprises the steps of muddy land consolidation and sterilization , ridging and early fertilizing, pachyrhizua angulatus seed planting, fertilizing and watering, field maintenance, and disease prevention, wherein the muddy land consolidation and sterilization comprises the following sub-steps: selecting a muddy land which is wet in surface, less in rock and gently sloping, comprehensively digging the muddy land, deeply digging for the first time with the soil turning depth of 30 cm, crushing after turning, airing for 4-6 h under sun, shallowly digging for the second time with the turning depth of 15 cm, crushing, airing for 3-5 h under sun, spraying a mixed solution which is prepared from dipterex and water by the mass ratio of 1:1000 to the muddy land, and 4 to 6 days later, comprehensively watering the muddy land till the muddy land is wet, wherein the spraying amount is 100-150 ml / m<2>. The planting method has the beneficial effects that the cultivated pachyrhizua angulatus is big in size and heavy in weight, high in content of powder and yield, good in economic benefit and strong in disease prevention capability.