An introduction has been made to the function and composition of Visual C++ 6.0, with a compilation of the electromagnetic calculation software of multi-phase asynchronous motor based on VC++, followed by a description of the main contents of software composition, operation interface and data management. Taking three-phase asynchronous Y160M-7.5 kW motor as an example, by inputting its basic and empirical parameters, the complete design process and its main characteristic curves can be obtained. A comparison between the design values of each parameter and the measured value reveals that they are basically identical, which verifies the feasibility of the software. The newly designed software helps to save the design input time of designers and optimize the design of motors.