Abstract: The paper aims to provide a theoretical basis for the optimal branch amount of‘Fuji’grafted on‘Y-1’ dwarfing interstock at high spindle system. In this study, ‘Fuji’ on ‘SH1’ dwarfing interstock were taken as materials, and the effects of branches 30, 35 and 40 on growth and fruit yields were studied. The results showed that, the tree height and stem diameter increased with the increase of branch amount, but there was no significant difference on tree height, stem diameter, crown diameter, shoot length and roughness under different treatments. The photosynthetic radiation of branch amount 35 and 40 was significantly higher than that of branch amount 30, and there were extremely significant difference on the leaf area index among the three treatments. The leaf area index of branch amount 35 was 3.78 and 3.43 under the crown and between the trees respectively, belonging to the optimum leaf area index range of apple cultivation. The fruit yields increased with the increase of branch amount, but the effect was not obvious in the full bearing period. The high quality fruit rate of branch amount 35 was significantly higher than that of the other two treatments, meanwhile, the single fruit weight, soluble solid content and fruit hardness were significantly higher than that of the other tw treatments, the fruit quality was excellent with the lowest acid content. Considering the factors such as the tree growth potential, light energy utilization, fruit yields and quality, practical management and so on, branch amount 35 is the appropriate amount for high- spindle- shaped tree of‘Fuji’grafted on‘Y- 1’dwarfing interstock.