Security is a sensitive problem for every Amphitryon who undertaking an International big activity.The supervision of entry/exit is the first step for the Amphitryon to ensure its nation security as well as the activity security. According to Doha Around negotiation as to trade facility，custom should not impede free trade or establish non-tax trade barrier. Thus our custom has to take advantage of its limited resource to realize trade security as well as trade facility. This article will discuss the trade security and facility problemfrom the view of World Expo Shanghai held in 2010.