Foreign exchange control system is an important part of domestic finance law.An appropriate arrangement of foreign exchange police can uphold equilibrium of balance of payment,and protect national financial market from attacking of international speculation.But the over-restrict foreign exchange regulation is considered as a non-tariff barrier,distorting normal international trade,so it's not in conformity with the principle of the WTO.In practice,however,the specific policies about foreign exchange in the WTO scattered in the GATT1994,GATS and another agreement is hard to grasp comprehensively.So this article is aim to illustrate these provisions,hoping to rationally explain the specific rules to its members in the WTO.