Roller waterproof device of belt conveyor

The utility model relates to a roller waterproof device of a belt conveyor. The roller waterproof device of the belt conveyor comprises a gland (1), an asbestos gasket (2) and a framework seal (3), wherein the gland (1) is connected with a bearing outer seat (4) through a bolt, the asbestos gasket (2) is arranged between the gland (1) and the bearing outer seat (4), the center of the gland (1) and the center of the asbestos gasket (2) are respectively provided with a hole through which a central shaft (5) passes, the framework seal (3) is fixed in a concave ring at the inner side of the hole in the gland (1), and the framework seal (3) holds the central shaft (5). The roller waterproof device of the belt conveyor can prevent mud and water mixture from entering a bottom roller bearing in the radial and axial directions, lowers the damage degree of the bearing, prolongs the service life of the bearing and the continuous operation time of a machine, guarantees continuous operation of an upstream system and a dow