With　the　continuous　development　of　economic　globalization　and　regionalization,　China＇s　regional　economies　are　undergoing　great　changes,　with　urban　agglomeration　being　the　key　to　the　fast　development　of　China＇s　economy.　This　paper　conducts　an　empirical　analysis　of　China＇s　10　major　urban　agglomerations＇　economic　efficiency　in　the　years　2009-2013　by　applying　DEA　method　and　related　panel　data,　aiming　to　reveal　the　changing　trends　of　urban　agglomerations＇　economic　efficiency　and　at　the　same　time,　analyze　its　influencing　factors.　The　research　shows　that　China＇s　urban　agglomerations　are　developing　with　obvious　characteristics　of　integration,　such　as　large-scale　and　collaboration.　The　comprehensive　economic　efficiency　of　China＇s　urban　agglomerations　has　been　a　rising　tendency;　the　gaps　between　agglomerations　are　being　widened　further　and　over　60%　of　them　have　the　potential　to　scale　up　in　the　near　future.　In　addition,　the　average　resource　utilization　rate　of　agglomerations　is　about　90%　and　labor　redundancy　is　the　most　serious　problem.　It　is　also　concluded　that　eastern　urban　agglomerations　are　generally　better　at　integrated　management,　resource　allocation　and　utilization,　and　large-scale　gathering　capability,　followed　by　those　in　central　and　then　western　areas.