Abstract: 4 years old dwarfing intermediate stock Yanfu 3 and Tianhong 2 apple trees were used to study the influence of different load to the tree growth,fruit quality and yield.The result showed that the load on tree height,crown diameter,shoot length and trunk circumference was not significant.With the increase of load,fruit weight,fruit shape index,fruit coloring area and smoothness became smaller,the content of soluble sugar reduced,but fruit firmness and titratable acid content had no significant change.The higher fruit load,the more serious of fruit dropped,so actual harvesting fruit number and actual output were much lower than expected.According to the comprehensive analysis,treatment 3 and 4 were more suitable load levels,and the yield was 30 000~33 750 kg/hm2.