The invention provides a direct-sowing quick-growing cultivation method of Jatropha curcas L., which comprises the steps of digging cultivation holes with depth of 28-32cm and diameter of 58-62cm, mixing a special compound fertilizer, digging planting small holes with diameter of 3.8-4.2cm and depth of 3.8-4.2cm in the surface soil at the center of the holes when sowing, placing seeds in the planting small holes, and completely covering the small holes with fine soil; when the main stems of the seedlings are more than or equal to 50cm, cutting off the main stems of the seedlings from the parts 34-36cm away from the ground; when the lateral branches of the first-level seedlings are more than or equal to 80cm, cutting off the lateral branches from the parts 60cm away from the branches of the main stems of the seedlings; when the lateral branches of each levels are 2m high away from the ground, pruning the high parts. By adopting the method, the technical problems of high cost, variable growth conditions, abnormal growth, and deferred flowering and fruiting of the existing forced seed germination, nursery seedling raising, and seedling transplanting are overcome, management and artificial picking are facilitated, the method is simple, labor and fertilizer are saved, the Jatropha curcas L. grows well, quickly grows and is high in yield, and good economical benefit, social benefit and ecological benefit are achieved.