Abstract: It first introduces the application of Chinese language multi-dimensional perspective selection in UAV, then designs the overall scheme of UAV flight control system, and designs the hardware part of UAV flight control system from the modules of attitude detection and altitude detection, finally establishes the UAV motion model and realizes the obstacle avoidance strategy of UAV autonomous flight. The flight experiment results show that the UAV can accurately fly from the starting point to the destination, avoiding obstacles in the middle, which proves that the UAV has good stability, and verifies the feasibility of the flight obstacle avoidance strategy.