Mechanisms for the Rehabilitation of Sex Offenders in Domestic Regulations and International Documents are one of the complex and debated topics in criminal justice systems. This article aims to analyze and evaluate different methods of reforming sex offenders with the aim of comparative study of methods and principles of rehabilitation of sex offenders in the two legal contexts of Iran and international regulations. At the international level, various documents such as the European Convention on Human Rights and UN declarations emphasize the observance of human rights and the prevention of torture and degrading treatment, and emphasize the need to provide humane conditions for the rehabilitation of sex offenders in prisons and after release. From the perspective of Iranian law, Articles 225 and 234 of the Islamic Penal Code, Article 10 of the Law on the Protection of Children and Adolescents approved in 2010, Article 82 and the second paragraph of Article 513 of the Criminal Procedure Code, and the rehabilitative approach of the Executive Regulations of the Prisons Organization approved in 2011 are important aspects of the reformative and rehabilitation approaches for sex offenders. The results of the article show that despite the differences in domestic and international approaches, creating a balance between punishment and reformation, and using human-centered methods, can lead to a reduction in recidivism and the successful return of criminals to society. In this regard, suggestions are made,