The digital physical hybrid simulation technology is an important means to meet the security and stability analysis and control and protection design of new distribution network with distributed resource cluster access. To apply the digital physics hybrid simulation technology to the system analysis and research accurately and effectively, it is necessary to adopt a suitable interface method, and the ideal transformer model is the most convenient interface algorithm. However, to solve the interface delay problem existing in this algorithm, the commonly used delay compensation methods can not meet the real-time, accurate and stable needs of the hybrid simulation of the new distribution network. Therefore, this paper proposes an interface delay compensation method based on repetitive control theory. A repetitive controller is designed to eliminate periodic error for transmission delay of the power amplifier interface, and the advanced phase correction signal generated by the controller is added to the feed-forward control voltage to compensate the voltage signal of the excitation power amplifier, thus the real-time compensation, simulation accuracy and stability of the system are improved. Finally, the validity of the proposed method is carried out, providing a new idea and reference for the design of digital physics hybird simulation interface algorithm.