Fruit grafting step for preventing erosion of rainwater and pests

The invention discloses a fruit grafting step for preventing erosion of rainwater and pests. The fruit grafting step for preventing erosion of the rainwater and the pests has the beneficial effects that a good grafting environment is provided for grafting operation by performing disinfection and preservation treatment on seed branches before grafting and performing deinsectization and sterilization on the surrounding environment of mother branches, so that the influence of bacteria and insect pests on healing of the grafting position can be avoided; the grafting position is wrapped with a disinfected forming layer of one same fruit tree, so that healing of the grafting position is promoted, and a protectable bark is formed in a relatively short time; meanwhile, three hard supporting rods annularly distributed are arranged on each layer wound by a thin film belt, so that subsequently grown branches can be conveniently supported and fixed; and the mode of sealing the edges of the two ends of the thin film belt