Using the research work of The Resource-Based View （RBV） theory, combining our former study, this paper pus forward the rent contribution analyzing and appraising method of supply chain competition advantage source. First, this paper sums up the main achievements in the RBV in competition advantage explaining, our study of supply chain model in RBV and the transfer relationship between trade price and variable cost among chain partners. Then this paper brings forward the definition and formula of partner rent contribution and presents the supply chain competition in this way. Based on these, this paper considers that the supply chain competitive advantage is composed of partners＇ rent contributions, and it is not the simply parallel summation of those contributions, but rather the transferring of those contributions one partner after another and gathering to the final partners that form the supply chain competitive advantage. Finally, this paper provides the rent contribution method and gives a simulation to appraise and explain the usage of this method in supply chain competition analyzing, supply chain construction, partner selection and evaluation