A quasi geostrophic barotropic model is employed for performing four experiments with 24h integration to investigate the impact of meso scale vortex streets in typhoon circulation on the typhoon intensity,and the results are compared to that of single meso scale vortex.Results show that the vortex united twice during the process of relative vorticity transfer(RVT) in the vortex streets.The VRVT of the vortex streets has little impact on the intensity of the typhoon,but VRVT of single meso scale vortex can enhance the typhoon.