In order to solve the problems of large displacement and poor precision of the stone in the deep water and large flow rate,the research and development of the riprap ship for block stone dumped in deepwater and large flow rate are carried out.The application of the grille U-shaped chute and the frame walk trolley ensure that the block stone in the large flow conditions are not scattered and the stone waste is reduced. The results of the filling surface inspection show that the rate of stone throwing is more than 90%.The high precision fixed throw filling is achieved.