With the purpose of establishing and maintaining social relations,the popular social network is particularly favored by college students.From Twitter,Face book,MSN,to the country’s real-name network-Renren,the leaps news QQ with a huge student-users and the arizen microblog are the sociacnetwork sites often wed by college students.People use social networks to maintain social entity-relationship,to show their own individuality and to express interest demands.With social networks playing important parts in students’ daily life,college students’ personality and values have been affected,which is worthy of our analysis and attention.