This paper analyzes the problems of the main credit evaluation model,and establishs an improved comprehensive evaluation model for C2C e-commerce credit;The improved model is based on the main indicators of the current credit evaluationt: product quality, logistics, and service attitude ,and comprehensive considerates the impact weights of various indicators ;At the same time , We calculate the user's credit with the counterparty creditworthiness number of transactions and transaction amount . For new users, We places the user's level of social credit in place of its initial credit status, and...