The electronic water pump is mainly composed of pump head, impeller, brushless motor and other parts, with compact structure and light weight. Its working principle is that the impeller is installed on the rotor of the motor, the rotor and the stator are isolated by a shield sleeve, and the heat generated by the motor can be exported through the cooling medium. Therefore, it has high adaptability to work environment, can adapt to the environment temperature of - 40 ° C ~ 100 ° C, and has a service life of more than 6000 hours. This water pump is specially designed for automobile circulating cooling system.