Virus-free potato cutting seedling planting method

The invention discloses a virus-free potato cutting seedling planting method. The method at least comprises steps as follows: 1) a 20 cm thick substrate is paved with river sand with the size of 0.5-1mm on a seedling bed, virus-free potato cutting seedlings are transplanted, and root systems of the virus-free potato cutting seedlings are buried into the substrate; 2) after transplantation, the cutting seedlings are covered with a plastic film and a sunshade gauze, the plastic film is removed step by step after the seedlings recover for 7-10 days and the cutting seedlings grow new roots in thesubstrate, and the sunshade gauze is removed after 30-40 days of transplantation; 3) water-soluble mixed fertilizer is applied after 9-11 days of transplantation; and 4) after the potato fruiting period begins, the maximum water-holding capacity of the substrate is controlled at 75%-80%, the temperature of the growth environment is controlled at 17 DEGC-25 DEGC, and diseases, insect pest and weeds are controlled on the po