Aluminium alloy have been widely used in such as aviation, construction, and automobile industry. In new energy vehicles, the electric drive motor is one of the three core components of new energy vehicles. It is the main executive structure in the operation of new energy vehicles, like water-cooled AC/DC motor. Its function is to convert the electrical energy of the power source into mechanical energy, through the transmission or directly drive the vehicle, playing an important role in new energy cars, green energy buses, electromobile or e-bike, etc.