this article analyses U.S.antidumping against China on the basis of U.S.trade deficit and callings of stakeholder groupes,indicating that the increasing U.S.trade deficit strengthens its inclination for trade protectionalist,and stakeholder groupes have great influences on U.S.antidumping conduction to safeguard theirs interests.At last this article builds an empirical model to lead to a concrete corelationship between the U.S.antidumping and U.S.trade deficit,U.S.unemployment rate