Abstract: Objective: Metro vehicle doors frequently open and close during operation. With accumulated operating time, the wear of the metro vehicle door transmission components can lead to degradation of transmission system, thereby affecting the door open/close performance and operational safety. To eliminate the degradation effects and improve the vehicle operation reliability, it is necessary to study compensation control strategies to correct deviations caused by system degradation. Method: By introducing the basic structure and open/close action principles of the metro vehicle door transmission system, the stress states of the main transmission components during door actions are analyzed. A dynamics model of the door transmission system is constructed, and the transmission system equivalent dynamics model is transformed into corresponding transfer function. The variations in the transfer function are analyzed, and an automatic compensation control strategy is implemented to maintain the door open/close performance in a healthy state. Simulation analysis and comparison are conducted on the door displacement and velocity before and after applying the automatic compensation control strategy. Result & Conclusion: The effectiveness of the proposed strategy is verified. Implementing the strategy reduces fluctuations in the door opening and closing speed caused by degradation of the transmission system components, thereby enhancing the performance of door operation.