The work aims to summarize the current development situation of the cushion landing and assess the performance of heavy equipment airdrop airbag landing system. The LS-DYNA finite element model of an airbag buffer system for a heavy equipment was established. Simulation calculation was carried out for the model. Velocity history and acceleration history of the landing gear were analyzed. The results showed that under the action of gravity acceleration, the speed of the simulation model accelerated from 4.8 m/s to 5.4 m/s in 0.15 s. The model continued to accelerate to the maximum speed as acceleration was reduced to zero under the cushion of the airbag, and then under the action of reverse acceleration, reverse speed was generated after a sharp deceleration. After several fluctuations, the final speed was basically zero, which meant successful landing. In conclusion, the change process of both the velocity and the acceleration satisfies the rule of airbag safety landing, and the feasibility of simulation is reflected.