Abstract: Analysis of waste aluminum recovery in China’s automobile industry was carried out by a system dynamic model. When the average service life of the automobile assumes to be 12 years， the annual recycling number of the used automobiles in China will be 24.5992 million and the annual recovered aluminum weight from these automobiles will be 1.8242 million tons in 2025. It would be 21.7275 million for the annual recycling number and 1.3459 million tons for the annual recovered aluminum if the average service life of the automobiles becomes 15 years. Meanwhile， there will be 3.5418 million tons of bauxite saved from the recycling. After considering that the recycling ratio of aluminum-containing processed materials， the annual recycling ratio of automobile castings and the annual remanufacturing ratio of automobile castings are 0.9， 0.61 and 0.3， respectively， the annual recovered aluminum of the used automobiles can reach 1.6025 million tons in 2025. It is very helpful to alleviate the shortage of aluminum resources in China and reduce the external dependence of waste scrap aluminum.

Key words: system dynamics, lightweight, waste aluminum, recovery, simulation