Abstract: The high-lift system plays an important role in phase of civil aircrafts taking off, landing and cruising.The advantages of fly-by-wire controls in high-lift system can reduce the weight of system, improve the performance of system, and realize the advanced automatic control and the better robustness. In this paper, the design of computer control system is discussed based on the study of advanced high lift system in modern civil aircrafts, especially the redundant architecture design and the consistency mechanism.