In recent years，the Obama administration actively implement the Asia-Pacific “rebalancing” strategy，and further strengthen its “strategic South Anchorage” of the Asia-Pacific defense system. In this context，the author believes that Australia and the United States continuously strengthen their political exchanges and interaction，military security cooperation has been a breakthrough，economic and trade exchanges between China and the US hedge bets，and humanitarian assistance and foreign aid keeping up with United States pace. It can be said that the US-Australia alliance has been consolidating and improving in 2014.