Abstract: A hardware-in-loop visual test platform of transformers and induction motors is designed, which is mainly composed of DSP controller, MCGS touch screen, RS485 communication circuit and power module. DSP TMS320F28335 is the main controller of the test platform, which calculates the mathematical models of various transformers and induction motors under different experiments. MCGS touch screen is the upper computer, which is used to realize parameter input, waveform curve and internal magnetic field visualization of the motors. The RS485 circuit is utilized to transmit motor parameters and experimental simulation results between the controller and the touch screen. The data transmission protocol is Modbus RTU protocol. The platform has low hardware cost and good portability. Visualization of data, waveform curve and magnetic field can help students deepen their understanding of professional knowledge. The test platform meets the needs of experimental teaching and has achieved good teaching results.