The anthropogenic aerosols(sulfate, black carbon and organic carbon) and their effects on the East Asian summer monsoon have been simulated by using a regional climate model RegCM3 coupled with a chemistry aerosol model.Results show that aerosol can change summer 850 hPa wind over East Asia.A cyclonic anomaly circulation center appears on the estuary of the Yangtze River and the northerly air flow on its west will weaken the summer southwestly monsoon in East Asian.Investigation has been conducted on the relationship between spring and summer aerosol column burden over China and summer 850 hPa meridional wind in East Asia.Evidence shows that the aerosol column burden in both spring and summer bears a close negative correlation with summer 850 hPa meridional wind in East Asia.The summer southerly monsoon in East China weakens when the spring aerosol column burden over North China or the summer aerosol column burden over South China increases.The reasons may be the short wave radiative forcing caused by aerosol effects on the top of the atmosphere and the surface, which leads to the change of air pressure and potential height between sea and land.