With the maturity and universal application of 3G technologies, Internet business models continue to penetrate the mobile Internet business model. Mobile Internet is gradually becoming the main trend. Mobile Internet Economy will profoundly change the mode of business survival, growth and development. How to quickly find the direction of marketing efforts at the mobile Internet era, and start business "migration" are very important. This article discusses the four key aspects of the marketing chain in the mobile Internet economy: cross-industry alliance in mobile Internet economy, enterprise resources integration based on information flow, different patterns of mobile e-commerce, the development of application-oriented mobile Interne platform. The combination of these four aspects will promote industry cooperation in upstream and downstream enterprises, drive the mobile Internet market growth and pull the entire industry ecosystem extension and development.