The invention discloses an electric motor, and belongs to the field of electric power engineering. The electric motor comprises electric motor belt pulleys, an electric motor shaft, a shaft sleeve, fasteners and a connecting key, wherein the electric motor belt pulleys comprise the first belt pulley and the second belt pulley, the cross sections of the first belt pulley and the second belt pulleyare semi-circular rings, the first belt pulley and the second belt pulley can be combined into a hollow cylindrical structure, the electric motor belt pulleys wraps around the shaft sleeve, and the electric motor belt pulleys are connected with the shaft sleeve through the fasteners; the shaft sleeve wraps around the outer surface of the electric motor shaft, and the shaft sleeve is connected withthe electric motor shaft through the connecting key; and the fasteners penetrate through the electric motor belt pulleys and the shaft sleeve to be in contact with the outer surface of the electric motor shaft, and the belt pulleys can be separated from the shaft sleeve by screwing out the fasteners. According to the embodiment of the electric motor, the electric motor belt pulleys with the splitstructure are provided, the electric motor belt pulleys with different sizes can be replaced by screwing out and screwing the fasteners, the safety performance is good, and the working efficiency iseffectively improved.