3D laser scanning technology is mainly used in topographic mapping,building modeling and cultural relic restoration.To expand the application of this technology in physical model test,Trimble CX 3D laser scanner is used to measure the overall shape of physical model of riprap dike with broad shoulder,and then the scanning data are processed and mapped by Trimble Realworks 9 and GMT 5.4.Compared with camera photos,3D laser scanning technology possess the characteristics of more convenient operation,higher accuracy and more outstanding visualization,and it can replace some functions of traditional measuring instruments in physical model.The scanning results before and after the test show that the riprap dike with broad shoulder will deform obviously under the action of waves,but eventually changed into a dynamic stable S-shaped profile.