A law must have a historical until it’s applied in life. The importance of a banking activity that affects the pattern of people's lives, especially Islamic banking which is increasingly in Indonesia. So this article will describe the history of the development of Sharia Banking Law in Indonesia and the implications of its development in the Practice of National Banking. The method used in this case uses a descriptive analysis approach. A qualitative method with library studies in the existing problems. Then, it can be seen that the regulations concerning banking have undergone several amendments which in the end of Law Number 21 Year 2008 has become the basis of applicable law. In its implications, there are also three stages, namely the stages of recognition, recognition and purification. So that as a legal practitioner in Islamic banking, it is necessary to carry out a continuous review to monitor banking activities in accordance with Islamic principles. And to improve knowledge and understanding so that the existing guidelines are not just regulations but are truly implied in accordance with applicable law.