Abstract: According to the characteristic of the existing main R-D models, these R-D models are firstly classified into three categories: analytic, empirical and semi-analytic. And then their quantitative performances are evaluated. After the performances of the existing main R-D models are in-depth analyzed and compared, some general rules are proposed to select the best model for a target system. On this basis, an algorithm for establishing the piece linear R-D model and a method of property analysis and modification are proposed according to the feature of Peer to Peer (P2P) video streaming media system. The experience results show the piece linear R-D model is accuracy and the method of property analysis and modification is validated.