Traditional power electronics experiments are knowledge-oriented for teaching, mainly based on confirmatory experiments, and lack of project training with engineering background. For this reason, the modular circuits and open interfaces in hardware, and digital processing technology in control were used in the bidirectional DC-DC converter designed in this paper. Students’ application, design and innovation abilities can be cultivated by the bidirectional DC-DC converter. Firstly, the power electronics innovation experimental platform based on bidirectional DC-DC converter was built. Secondly, the hardware design of the bidirectional DC-DC converter was completed, and the converter control system was built. Then the converter topology and control strategy were introduced, the hardware circuit and parameter design were described in detail, and the software design was carried out. Finally, the test and analysis of the software and hardware experimental platform were completed. The experimental results show that the experimental platform built can realize boost discharge operation and buck charge control, which can meet the requirements of innovative experimental teaching.