This paper is the research results on the implementation of Compilation of Islamic Law (CIL) on inheritance law in the Sleman Regency, Special Region of Yogyakarta, in 2019. This study aims to determine the extent of the implementation efforts and uncover some factors hindering the implementation efforts. The type of research used was qualitative, with a qualitative descriptive analysis approach describing the reality under study. Meanwhile, this research’s findings revealed that in the inheritance implementation based on CIL in Sleman Regency, Special Region of Yogyakarta, several differences were still found in interpretations of inheritance law, there were internal family conflicts related to inheritance due to differences in education levels, and the court administration system has not been fully organized with both good and time inefficient