Study This aims To know the application of relationship marketing by USPPS Ausath Blokagung to increase customer loyalty And Also To know inhibitors and support USPPS Ausath Blokagung in applying relationship marketing. The method used is qualitative, i.e., the researcher collects data using observation, interviews, and documentation. Then, it was done to test credibility with the triangulation technique. Tool analysis of the data uses data collection, data reduction, data display, withdrawal conclusion, and verification (Conclusion drawing/verification). The research results show that relationship marketing enters the category Enough Good, so Also mark service And loyalty customers tend to be pretty loyal. A significant relationship exists between marketing and mark service and the implications on USPPS Ausath customers Blokagung. Mark positive. This indicates that the taller the mark service that customers feel in consuming service, the more the loyalty of USPPS Ausath customers Blokagung will increase. From the Islamic perspective, relationship marketing is mark worship, as Prophet Muhammad SAW exemplifies. Factor supporter in application relationship marketing applied by USPPS Ausath Blokagung, namely USPPS Ausath Blokagung, Already has a Name from Darussalam Islamic Boarding School Blokagung, which is Wrong One boarding school in Banyuwangi. Meanwhile, factor inhibitor is limited room scope USPPS Ausath marketing Blokagung.