The invention provides a river restoration wetland system, which comprises an algae removal assembly, a filter assembly and a main body assembly, the algae removal assembly comprises a first conveyor belt driven wheel, a conveyor belt, a baffle plate, a second conveyor belt driven wheel, a conveyor belt driving wheel and a motor; the main body assembly comprises a ship body, a first supporting column, a first supporting plate, a second supporting column, a base and a supporting block, and the first supporting plate is welded to the middle of the upper surface of the ship body; a motor drives a conveyor belt driving wheel to rotate, the rotating conveyor belt driving wheel drives a first conveyor belt driven wheel and a second conveyor belt driven wheel to rotate through a conveyor belt, and the rotating second conveyor belt driven wheel conveys algae to a ship body through a baffle, so that algae salvage work is completed, and the situation that water is polluted by algae is avoided; therefore, the purpose of water purification is achieved, the algae cleaning effect is improved, the work efficiency of algae removal and water purification is improved, and meanwhile secondary pollution of water is avoided.