Abstrak :This paper discusses the modernization and reform of the development of Islamic law and social institutions in Islamic countries as a comparative study of Indonesia and Malaysia. Islamic law revealed by Allah aims to prevent confusion in the community and bring benefit to them, directing them to truth, justice and wisdom and explaining the path that must be passed. In this case, it is based on five main priorities, namely maintaining religion, soul, mind, lineage and property, based on the al-Qur'an which is universal and dynamic. Thoughts on the development of Islamic law have long been studied by Western historians, especially those who have a tendency to justify the authenticity of Islamic law. Because the legal theme has a rela...