This article describes the implementation of sustainable financial policies by Islamic Banks and Conventional Banks in supporting environmentally sound business activities in their business activities to minimize environmental damage. The research method in this study is the normative juridical method, namely descriptive-analytical. This research concludes that after the publication of the sustainable finance policy, the business activities of financial service institutions are still in the stage of raising awareness of the financial system in providing financing. Then in its operations, it still calculates paper savings, construction of green buildings, and the amount of financing provided to the company. So that the business activities carried out still cause damage to the environment.