Stator laminated plates of an enclosed type motor are made of a preset number of laminated plates. Each laminated plate is composed of a main plate and two coupling plates. Each main plate is punched with a rotor inner hole, and two wing members extends from the two sides of the rotor hole, and spaced apart from the rotor hole in the same distance. Each wing member has its open end formed with an engage portion and each coupling plate assembled on the wing member of the main plate has the opposite ends respectively formed with a combining portion engaged with the engage portion of the wing member. The main plate and the two coupling plates are firmly combined together by mutual engagement of the engage portions and the combining portions, enabling the rotor to rotate smoothly and increasing the starting torsion and horsepower of the motor.