The relationship of parasocial Interaction is one of the important contents of marketing research in recent years. With the rise of internet economy in the world, more and more enterprises' marketing practices are involved in the marketing process of SNS based on social networks. The interaction between medium and audiences has broken through the non-face-to-face one-way communication mode and forms a twoway communication mode of the relationship of parasocial Interaction in the SNS environment. Based on the signaling theory and the social exchange theory, this dissertation clarifies the driving factors and mechanism between Fashion web celebrity and attributes and relationship of parasocial interaction through the literature review, In the South China, Middle and North China, there were N audiences who used SNS experience as survey target to conduct a survey. And analyzed these data with SEM software. The research found that between Fashion web Fashion web celebrity and attributes and SNS participation motivation show a positive correlation with relationship of parasocial interaction, and there is a positive correlation between relationship of parasocial interaction and identification, relationship of parasocial interaction and identification have positive correlation with customer equity. E-WOM on customer asset-driven process has a clear intermediary role in the relationship of parasocial Interaction. This not only enriches and develops the existing research results of relationship of parasocial Interaction, but also provides guidance for enterprises to manage relationship of parasocial interactions. In addition, it also provides valuable theoretical guidance for enterprises to promote SNS marketing management practices.