The traditional PWM servo is mainly used in the field of RC airplane,RC Car and other model fields, which has the function of angle instantaneous steering. Nowadays, the servo is not only used in the field of RC model, but also in the mechanism of small space transmission and steering in all walks of life. However, in different application scenarios, there are certain requirements for the structural characteristics and electrical control characteristics of the actuator. Appropriate structure and electronic characteristics can not only prolong the service life of the servo but also avoid problems in the research and development and mass production. According to the application requirements of customers in the products, we have optimized and improved the design, material, technology and electronic control function of the servo. Developed a number of different torque, speed, different material life requirements, different electrical control requirements of the programming servo.