The invention discloses a cultivating method of grape seedlings. The cultivating method comprises the following steps that 1) a sunshelter is built; 2) river sand is permeated into 1/4-1/3 soil in the sunshelter, a bed is finished, and the bed is 0.8-1.3 meters wide and 15-25 centimeters high; 3) semi-lignification summer tender tips more than 0.4 centimeter thick are collected to be cut into 3-4 sections of branch sections 20-30 centimeters long, the uppermost leaf is reserved, and a cutting panicle is obtained; 4) the cutting panicle is socked for 1-2 hours, then the root of the cutting panicle is socked and dipped into a rooting agent for 5-10 seconds, and cutting of the panicle is vertically carried out according to an array pitch of 20-30 centimeters and a planting distance of 10-15 centimeters; 5) humidity in the sunshelter is kept to be more than 90%, the temperature is kept to be 20-25 DEG C, and fertilization is carried out after rooting; when roots of the cutting panicle are 3-5 in number and more than 5 centimeters long, sunshading is stopped; tips are bound when the cutting panicle is 25-35 centimeters high, and pinching is carried out when the cutting panicle is more than 50 centimeters high. According to the cultivating method, the conditions of a high temperature, rapid growing and a great number of green branches in summer are utilized to carry out green branch cutting, the survival rate is up to 80-90%, and when the seedlings reach 40 centimeters high, the purpose of grape seedling intermediate propagation can be realized.