This thesis try to contribute a legal research of the commercial arbitration system in Mainland China . With the developing of the Mainland China¡¦s economy, China¡¦s government is devoted to establish the legal system of the foreign investors don¡¦t trust the legal system of PRC. The commercial arbitration is a common and important way of the international disputes resolution. It will be more popular in the future.This article discusses about the international arbitration and the China¡¦s new commercial arbitration system. Not only introduces the arbitration law of PRC, but also discusses the internati -onal arbitration,for example UNCITRAL MODEL LAW and THE NEW YORK CONVENTION. This article also discusses relation between arbitration and the courts.