Abstract: Based on the construction of a national aluminum input-output model, the aluminum losses in China for the years 2001, 2004, 2005 and 2007 were investigated. Results show that the proportion of aluminum loss from domestic mining for the production and processing sector increased from 54.8% in 2001 to 64.4% in 2004, and the proportion of aluminum loss from domestic mining for the consumption sector increased from 47.6% in 2001 to 53.1% in 2004. The total amount of aluminum loss increased from 32.5% in 2001 to 42.4% in 2004. The growth rate of the aluminum loss from domestic mining decreased to 4.9% from 2004 to 2005, then increased to 8.8% from 2005 to 2007. The aluminum loss from domestic mining accounted for the largest proportion of the total loss amount, which was 34.1%, 44.8% and 36.3% in 2001, 2004 and 2007, respectively. This result suggests that reducing the loss from domestic sources by improving the efficiency of domestic aluminum mining and processing technology level was essential. The aluminum losses from imported sources varied slightly, accounting for 30.9%, 39.1%, 35.8% and 33.3% in 2001, 2004, 2005 and 2007, respectively. To reduce the rate of loss of aluminum in China, more recycled aluminum should be utilized in the future.