The work aims to study the changing process of airdrop cargo extraction posture and provide references to determine the best binding part of the gravity center position of cargo. Based on the Ansys/LS-DYNA software platform and with a certain type of heavy equipment airdrop system as example, the microcosmic changing process of cargo extraction posture in different situations was researched by numerical analysis method, including the change of turn-over angle and turn-over speed as time changes. Then the best binding part of the gravity center position of cargo was determined. The numerical analysis was done on the turn-over process of cargo with different gravity center positions at the extraction speed of 1 m/s, and the best binding part of the gravity center position of cargo was determined. In conclusion, the binding part of the gravity center position of cargo has a significant influence on the cargo extraction posture. Analysis of the changing process of airdrop cargo extraction posture by numerical simulation method can get accurate and close-to-actual solutions.