The invention relates to the technical field of plant grafting cultivation, in particular to a walnut seedling grafting propagation method. According to the walnut seedling grafting propagation method, a culture solution is prepared from, by weight, 3-5 parts of ethyl alcohol, 2-3 parts of sodium hypochlorite, 3-5 parts of streptomycin, 3-5 parts of gibberellic acid, 4-6 parts of brassinolide, 3-5 parts of 2,3-dichlorphenoxyacetic acid, 3-5 parts of N-(3-chloro-4-pyridyl)-N'-phenylurea, 2-3 parts of rosin, 4-6 parts of jasmonic acid, 4-6 parts of salicylic acid, 3-5 parts of rooting powder and 2-3 parts of water-retaining agent, and then the propagation steps of stock and scion preparation, disinfection, grafting, soaking and the like are carried out. The walnut seedling grafting propagation method is scientific and reasonable in formula, the walnut seedling wound healing time can be shortened, growth can be promoted, and the grafting survival rate can be increased.