With the flourishing of the network community in colleges and universities,problems such as anomie of expression and conflict of discourse are exposed constantly,which has led to many online public opinion incidents.Therefore,avoiding conflicting expression has become one of the important tasks of college builders.This paper summarizes the evolution trends and internal mechanisms of conflicting expressions through a five-year participant observation of a college network community.On this foundation,this paper points out that the role orientation of individuals restricts their participation in conflict expression,while avoiding conflicting expression requires online and offline integration and mutual consultation between colleges and students to maintain community order.