Method and device for relieving coastal wave erosion and utilizing wave energy

The invention discloses a method and device for relieving coast wave erosion and utilizing wave energy. The device comprises a power transmission cable, eccentric cylinder power generation devices installed around a coast or an island in an array mode and an energy storage station arranged on the coast or the island. The eccentric cylinder power generation device can convert kinetic energy and potential energy of waves into mechanical energy of an eccentric cylinder under the action of wave impact streaming, the mechanical energy is converted into electric energy through a power generator, and the electric energy is transmitted to an energy storage station through a power transmission cable. According to the method, an eccentric cylinder power generation device can convert kinetic energy and potential energy of waves into mechanical energy of an eccentric cylinder under the action of wave impact streaming; at the moment, the non-directional motion-to-unidirectional motion conversion mechanism mounted on the e