This article starts with the analysis of the changes in marketing strategies of e-commerce under the background of the network era, and then makes an in-depth analysis of the concept that e-commerce should adhere to the good faith management in marketing, and then elaborates in detail how e-commerce changes its marketing strategies and operations, including the detailed discussion and planning on the changes in product prices, how to attract more customers, the duration of products in the market and the renewal and promotion of products in the market. Starting from the reality of today's society, e-commerce is developed and improved in the new marketing strategy while the marketing strategy is updated.