Sharia Financial Institutions aim to improve the economic empowerment of the Acehnese people based on Islamic economic principles. The purpose of the study is to understand how the Impact of Conventional Bank Customer Switching to Indonesian Islamic Banks on the implementation of Aceh Qanun Number 11 of 2018 and the obstacles to its implementation. Qualitative research approach, data collection techniques of observation, interviews, and documentation, data analysis techniques of data reduction, data verification, and drawing conclusions. The results of the study indicate that the impact of the conversion of conventional bank customers to Indonesian Islamic banks on the implementation of the LKS Qanun has not been effective and efficient yet can not be felt optimally by bank customers. Barriers to the Switching of Conventional Bank Customers to Indonesian Sharia Banks on the implementation of the LKS Qanun on internal banking financial institutions operating in Aceh. Banks are unprepared for changes in systems, programs and services provided by existing banks to customers which results in low service delivery, most of which are related to cash withdrawals and transfers at automated teller machines (ATMs). Other things, such as a slow network, empty ATMs, become obstacles for customers. External barriers are caused by the lack of socialization of the LKS Qanun from the Aceh Government. It is hoped that all banking financial institutions can immediately adjust their banking programs in accordance with Islamic sharia principles that have been stipulated in the Aceh Qanun, so that the implementation of the LKS Qanun can be effective and efficient in its application, and it is hoped that the Government can provide optimal socialization of the LKS Qanun to the public.