English is an important component of higher education system in China, and the traditional English classroom teaching needs to be changed in the new era. Mobile communication network and instant communication tools provide a new teaching platform for the rapid development of college English teaching. As a kind of instant messaging service tool, WeChat should be applied to the mobile learning in college English, which is conducive to the promotion of College English learning, build good atmosphere of autonomous learning, and enhance the learning effect. Based on this, the paper on mobile learning and WeChat makes certain analysis, discusses the advantages of WeChat software which is applied to college English mobile learning, and then discusses the construction of College English mobile learning platform based on the WeChat model. Finally, from a practical point of view, the author explores the significance of developing WeChat based College English mobile learning.