In order to simulate the initial process of airborne more truly, this paper is first to present the simulation methods of stable parachutes in airborne wind tunnel tests in China, including figuring out the similar parameters and simulating the drag coefficient. It mainly discusses a method to measure drag coefficient by fastening counterweights onto the extremity of parachute and doing the free fall tests. It is demonstrated that the method can accurately measure the drag coefficient, and opening holes on the top of the stable parachute can effectively adjust the drag coefficient and make the falling of stable parachutes steadier. The wind tunnel tests results agree with the complex flow field characteristic near the fuselage, and are in line with the airborne trajectories law on video. It shows that the simulation technology of stable parachutes is feasible.