The invention relates to a cultivation method for plant Maca, comprising the following steps of: processing by seeds, sinking the seeds to accelerate germination, sowing by a tray, management in seedling period, transplanting, discharging water, fertilizing, intertill weeding, harvesting and storing. The nutrient components of the Maca obtained by the method of the invention exceed the nutrient components of the Maca produced in Peru and Yunnan; the dry Maca contains as high as 16.8% of protein and 12.6% of polysaccharide; and the invention provides new way for planting the Maca in high height above sea level, high latitude and dry whether.