Abstract: In order to improve the technology of apple seedlings breeding,one-year-old self-rooted rootstock apple seedlings,’Liquan fuji’and ’Venus gold’,was used as experimental materials.Tree height,diameter,branch numbers,branch length and branch angles were measured to explore the influence of different levels of promalin trement on branching and growth of dwarf apple seedling and screening the optimal spraying concentration.The result showed that the best concentration of promalin treatment for’Liquan fuji’was 1 500 mg·L^-1,and 1 750 mg·L^-1 was the best for’Venus gold’.There were proper branch numbers,branch length,angles,tree height and diameter for early shaping after treated with the best level of promalin.