Abstract: Based on the concept of new engineering, a comprehensive experiment on variable frequency speed regulation of three-phase as asynchronous motors was designed for the course of motor and drive, and an experimental platform with Huichuan PLC and variable-frequency drive as the core was built. With the experimental platform , students can establish a simulation model of the speed control system using MATLAB/Simulink software, and perform interactive programming of the display screen configuration to monitor the key parameters of the motors in real time achieving precise control of the speed and rapid protection. Teaching practice has shown that students can engage in theoretical exploration, digital simulation, configuration programming, and experimental improvement using the experimental platform. Students not only cultivate their comprehensive ability and advance thinking to solve complex problems, but also enhance their confidence in daring to challenge and exercise their engineering practice ability.