Floatable flow-resisting and sand-resisting multi-functional device

A floatable flow-resisting and sand-resisting multi-functional device, comprising a hollow floatable body, a flow-resisting and sand-resisting plate, a flow-resisting and sand-resisting net and a mooring system, wherein a plurality of flow-resisting and sand-resisting plates are arranged, each of the flow-resisting and sand-resisting plates is arranged perpendicular to a seabed, a top end of the flow-resisting and sand-resisting plate is fixed to the bottom of the hollow floatable body, a gap is provided between a bottom end of the flow-resisting and sand-resisting plate and the seabed, such that the flow-resisting and sand-resisting plate does not make contact with the seabed while the device moves, the flow-resisting and sand-resisting net down to the seabed is installed between every two of the flow-resisting and sand-resisting plates, a top end of the flow-resisting and sand-resisting net is fixed to the bottom of the hollow floatable body, a bottom end of the flow-resisting and sand-resisting net makes contact with the seabed, one end of the mooring system is connected to the hollow floatable body, and the other end of the mooring system is fixed to the seabed.