In this paper, the flight parameters are obtained through the motion capture system, and finally the aerodynamic parameters of the powered small UAV are obtained through the formula derivation. First, use an accurate electronic scale to measure the thrust value of the UAV under different thrust powers to obtain the thrust curve of the UAV. Secondly, the drone conducts a flight test under the vicon motion capture system environment to obtain the position and attitude information of the drone during the flight. After smoothing and differential processing, the speed, acceleration, and angular velocity of the drone at each moment can be obtained 、 Angular acceleration. Based on the derived data, matlab modeling is used to generate aerodynamic curves for powered drones. The analysis of the aerodynamic curves obtained shows that the method can be used to describe unsteady aerodynamic effects and provide ideas for studying aerodynamic phenomena in centimeter-level flight.