The last decade has witnessed the great advancement of modern communicative technologies making it possible to con-duct learning and teaching on line with different kinds of Apps. Wechat Group is popular and free instant messaging software, in which group members can share kinds of information. Its distinctive features can meet the needs of on-line collaborative learning. Based on quantitative research, this article aims to prove its feasibility as well as its challenges in collaborative writing among Eng-lish major students.