Community public microblog is the microblog with the community’s name，focusing on the community affairs，their followers mostly come from the community.This paper analyses the public opinion and the appearance of the community public microblogs of Shenzhen University in solving the forbidden electrombile in Shenzhen University.This paper finds community public microblogs are the opinion leaders in the community and they have the function of agenda setting and collective mobilization.At the same time，the spiral of silence theory works in this situation.At last we suggest the community perfect its communication system and establish spokesmen in microblog.