The flight test is in the post stage of UAV research and development. In UAV flight test, the control surface test is important for UAV flight safety. At present, control surface need time domain analysis test one by one, which is time-consuming and low efficiency. In this paper, current time domain analysis of control surface is improved, use synchronous time domain analysis method of multi-control surface for control surface step response. The experimental results show that the experimental time complexity can be reduced by 83% and the experimental efficiency is improved under satisfying the experimental requirements.