Abstract: [Objective and Method]The difference of growth dynamic of cluster during different treatment of GA_3 and 6-BA was researched.[Result]It showed that the growth of cluster treated with hormone was raised. However,the growth quantity of hormone treatment was debased,and the depressed extent was increased along with the rise on concentration. There was no entire mode of "three-phases" of fruit spike in growth trend compared with control.The growth was quickened before May 28th,but it went to be gentle after that. The effect of hormone on spike length was greater than that of spike width.[Conclusion]The spike width was greatly increased,whose growth trend was similar to the control,especially the treatment of lower concentration hormone.