Abstract: Exhaustation of fights is a principle borned with commodity economy. Generall speaking, to safeguard free circulation of commodity and balancing interests are two important reasons to explain its justification. It can also be understood from the angle of jurisprudence and economics. Eg., it is a system arrangement to hormonize with intellectual property rights and right of things; it maintains both the expolitation of intellectual products and the protection of intellectual property, which has vital meaning in the operation of economic efficiency for intellectual products, fine social resources and the realization of the aim of intellectual property law.