The invention provides a river channel garbage cleaning device, and belongs to the technical field of operation. The technical problem that the cleaning efficiency of an existing river channel garbage cleaning device is low and other technical problems are solved. The river channel garbage cleaning device comprises a hull, two main rods and purse nets, the two main rods are hinged to the two sides of the hull respectively, each purse net is fixed in the length direction of the corresponding main rod and opens downwards, multiple support rods which are arranged downwards are fixed on each main rod, and the lower ends of the purse nets are fixed on the support rods; a connecting rod which can adjust the angle between each main rod and the hull is arranged between the main rod and the hull, one end of each connecting rod is connected to the hull and can slide in the length direction of the hull, the other end of each connecting rod is provided with a positioning sleeve which is hinged to the connecting rod through a universal ball, and each main rod penetrates through the corresponding positioning sleeve and is positioned. The river channel garbage cleaning device has the advantages that the garbage collection efficiency is improved, and the cost is reduced.