Abstract: Supply chain is capable of considerably reducing inventory amount and cost of its enterprises.And it enables its enterprises to get a cutting edge in competition with faster speed and better quality.Supply chain benefits not only a single enterprise but a group of enterprises.The foundation of the sustainable development of supply chain system and its enterprises is a rational benefit distribution mechanism.In this paper,a quantified study on inventory cost saving in supply chain is proposed.Based on it,n-person cooperation theory is applied to formulate a model on the distribution of inventory cost saving in supply chain with the τ method.

Key words: supply chain, benefit fistribution, n-person theory