Thechangeofflowvelocityinboundarylayercausedbyvegetationthroughphysi-cal model experiment in wave flume was studied.As the incident wave was regular and the wave period was constant， different vegetation densities and wave heights had different effects on flow velocity in bottom boundary layer of vegetation model.The experiment draws some conclusions.First， the measured flow velocity is slower than the theoretical value but velocity distribution regularities of three measuring lines along the length of vege-tation correspond with the theoretical velocity distribution regularities.Second， as the wave period and width of vegetation are constant， the maximum near-bed velocity increase with the increasing of vegetation density.Third， as the vegetation density is constant， the atten-uation effects become more obvious with the increase of wave height.