Abstract: The procedure of healing and surviving of graft tree with young scion was divided into four stages: formation of thin membrane between scion and stock; differentiation of callus; connection of cambium and functional normalization of vascular system. The major findings were as follows: At first there appeared a layer of thin membrane on the surface between scion and stock within ten days after grafting and the scion growth was not obvious; within 2 or 3 weeks, callus was formed, radial saps flew and scion growth started, attention should be paid to keeping humidity in this period; within 4 or 5 weeks, cambium between scion and stock connected, axial saps also flew, and graft tree grew up remarkedly and survived; after 5 weeks the wound between scion and stock healed completely, the function of vascular system normalized and the growth of graft tree accelerated.