Objectives: This research aims to find out how the understanding of managers, implementation, and supporting factors inhibit the integration of multicultural values. Methodology: This research uses qualitative methods of an exploratory nature focusing on holistic places, actors, and activities. Data collection using techniques in this study is obtained through interviews, observations, and documentation. Data sources of all elements of personnel involved in boarding school activities. Results: The study results include the first management's understanding of the integration of multicultural values theoretically partially understood to have been practically implemented since the establishment of pesantren. It is based on the educational program used in the TEGALREJO MAGELANG API boarding school, which uses three learning curricula: a.Kemendikbud curriculum, b. Pesantren curriculum / created by pesantren, c. Hidden Curriculum / unplanned curriculum. Both implementations of multicultural value integration have not been maximized. It is proven that santri better understands the value of multiculturalism between religious communities than understanding the internal multicultural religion. Third, in the implementation of the integration of multicultural values the, are supporting factors such as a. close relationship between Kiai, Santri, alumni, alumni families, and the surrounding community b. the emergence of harmonious relationships in the pesantren environment, c. student motivation to seek knowledge about religious orders earnestly. While the inhibitory factor a. in the learning process b. in the integration of multicultural values in inadequate infrastructure.