For the problem of the active connected hook’s energy dissipation and beach protection effect,we analyze the beach height changes，changes of flow rate in casting test area and surrounding waters,near bottom turbulence intensity,sediment concentration,gradation change of sediment particles before and after being casted.The comparative analysis shows that the energy dissipation protection of active connected hook is better.The following conclusions are drawn:1)The active connected hook has reduced the flow strength in the casting area and has the overall effect of blocking water diversion.2)The activity intensity of coarse sediment near bottom is obviously weakened,and depositional environment changes to siltation.3)After the hydrological process of a dry season and the hydrological process of a flood season,the total deposition occurred in the casting area,with an average of 0.48 m.