In the application of electro-mechanical actuator(EMA), the master-active mode and the active-standby mode are two different redundancy design methods. An EMA functional platform controlled by dual motors is designed, and the response of the motors of the EMA dual motors in the master-active mode and the active-standby mode is studied, and the advantages and disadvantages of the two working modes are analyzed, so as to provide effective reference and guidance for the design and application of EMA system, so as to meet the specific application requirements and improve the reliability and safety of the system.