Fecha de publicación: 24/06/2015 Fuente: Wipo tomato The invention relates to a symbiotic cultivation method of a tomato grafting with a purple spring potato. The method comprises the steps that a tomato seed is sowed, and a purple spring potato is planted; when the height of a tomato grafted seeding ranges from 10 cm to 15 cm or the grafted seeding has six or eight leaves at the last ten-day of February, grafting is conducted; growing point and one cotyledon of the purple potato are cut by a blade, then a peeled bamboo stick is aslant inserted downward about 1 cm from a main vein with a stock and the cotyledon being peeled off in the direction of a cotyledon on the other side, a wedge-shaped plane with the length of the oblique plane about 1 cm is peeled at the position below the a tomato cotyledon 1 cm to 1.5 cm by the blade, and a peeled scion is inserted into a hole. When a graft union is healed, a full and integrated symbiotic plant of the purple potato and the tomato is bred, and the tomato above the ground and the potato below the ground can be harvested at the same time, high yield and funny ornamental value are integrated in one, and the use ratio and disease-resistant ability of the land are improved.