It is very important to develop a sound unlock control architecture of high safety flight lock control system in civil aircraft door electric control. The flight lock system is used to prevent the aircraft from human deliberately opening passenger door, service door or emergency exit door during flight. In airworthiness certification activities, Class I safety events that the flight lock system fail to unlock in the ground emergency evacuation phase are defined. According to the actual use requirements of the flight lock control system and airworthiness regulations, a relatively loose unlock logic was set. In order to meet the high safety requirements of flight lock system in emergency situation and improve the robustness and reliability of system, emergency evacuation system control signal and flight deck manual control signal mechanism were introduced into the flight lock system to improve the automatic control in the case of emergency evacuation and the pilot’s control authority over the flight lock control system. The design of the flight lock system reduces the Functional Development Assurance Level (FDAL) of flight lock system from A to C, effectively decreases development cost and personnel development energy, and improves the safety of flight lock system to reach total control and precise management of flight lock system.