Abstract: Objective To analyze knowledge,attitudes and behaviors of providing Long Acting Reversible Contraceptive(LARC)to nulliparous youth among service providers.Methods A total of 410 doctors from 41 hospitals were selected using cluster random sampling,and self-administered questionnaire was used to collect information during September to December 2018.Results Only 21% service providers participated in training of‘provision of LARC to nulliparous youth'. Generally,their awareness of LARC was acceptable; their attitudes towards “provision of LARC to nulliparous youth ” was positive. Although training could affect their knowledge and attitudes positively(P<0.05),it couldn't affect their behaviors(P>0.05). The factors from service providers,clients and social environment could prevent doctors from providing LARC to nulliparous youth.Conclusion Training of service providers should be improved to update their knowledge. LARC should be the first line contraceptives recommended to married nulliparous youth who haven't birth plan within 2 years and unmarried nulliparous youth undergoing repeated abortions under the circumstance of informed choice. At the same time,hospital should provide policy to ensure human resource and working post,increase the variety of contraceptives,and the society should strengthen advocacy and adolescent health education.