The problem of internet addiction among adolescents becomes more and more serious,which has caused extensive concern of the whole society.People are exploring various methods to carry on effective intervention on it.Among them,the family therapy was widely used in the intervention of adolescent internet addiction,and it has good effect.This paper analyzes the role of family therapy in the intervention of internet addiction among adolescents,and expounds several major family therapy modes and their applications in internet addiction intervention.At the end,the application situation and prospects of family therapy are discussed.