Objective To make a exploration of the function of advocacy in the promotion of sex and reproductive health education for adolescents.Methods The advocacy played a key role on the promotion of adolescent sex and reproductive education by taking "International cooperation project to promote Chinese youth reproductive health "(YRH project) as example.Results The successful experience of YRH project indicated advocacys important function in the promotion of sex and reproductive health education for adolescents.Conclusion Advocacy is a crucial element in promoting adolescent sex and reproductive health education.