In the new era, the modernization of education promotes the gradual reform of the education
system, and many new educational concepts and methods have been used in education. Group interaction
is a modern teaching method, which has significant value in College English writing classroom. It
gives full play to the role of peer support to promote the overall improvement and common progress
of students’ English writing level. This paper mainly analyzes the role of peer support in the group
interaction of College English writing class, and explains the value to English writing teaching.