This paper proposes a calculation method based on the rocket sled test method to quickly verify the performance of the main drag chute of aircraft. According to the working principle and folding process of the drag chute, combined with the pre-processing folding and calculation folding methods, the simulation folding process of the finite element model of the drag chute is designed, the finite element model of the rocket sled system was established. Then, the S-ALE fluid structure coupling algorithm was used to simulate and calculate the performance parameters of the rocket sled drag parachute system during the parachute deployment process, forming a simulation verification process for the parachute deployment performance of the drag chute. The calculation results show that the force on the rope of the drag chute during the operation process of the rocket sled drag parachute system shows a consistent trend over time, and the error generated by calculating the opening performance parameters of the rocket sled drag parachute system using the method proposed in this article are within 12%, which can meet the requirements of engineering use. The calculation method proposed in this article can to some extent replace the rocket sled test to verify the performance of the parachute. The calculation method proposed can quickly predict the performance of the drag chute instead of physical tests at the initial stage of development.