This paper studied the cushioning property and the environmental adaptability of the airbag landing system in the process of landing. Based on rigid dynamic equations and thermal dynamic equations, the analytical model of airbag landing system was developed. The calculation software of the cushioning property of airbag was compiled based on the model. Experimental research was carried on the cushioning property of airbag. The validity of the analytical model was verified through comparing with experimental data. The research results indicated that three key factors had significant influence on the cushioning property of the airbag landing system, including atmospheric pressure, air density, and ambient temperature. When the altitude was 0, 3000 and 4500 m, accordingly, the landing speed was 0.52, 0.96 and 2.31 m/s respectively. In conclusion, the cushioning property of the airbag landing system can meet the design requirements and can adapt to the air-drop environment in high altitude. As the landing speed of the air-drop equipment significantly increases along with the increase of altitude, the applicability and safety must be evaluated to ensure the safety of the airbag landing system of the airdrop equipment to avoid damage to the equipment due to high landing speed.