Abstract: In order to explore the influencing factors of automobile 4s marketing model, based on SCP paradigm theory, from the three aspects of market structure-market behavior-market performance This paper studies the characteristics of the existing automobile 4s marketing model, and establishes the evaluation index system and the comprehensive evaluation model. And then to Chengdu car market as an example, its 4S sales model for the analysis and comprehensive development evaluation. According to the evaluation results, experts for the Chengdu 4S shop marketing development. Based on this, the paper puts forward some suggestions on the development of 4S sales model in Chengdu car market, which provides some reference for the government to formulate relevant policies and other scholars' further research.