This study examines the importance of multicultural education in achieving cross cultural and inter-cultural education within the school learning environment and its imlication on school administration in Ika South Local Government of Delta State, Nigeria. This study adopted a descriptive study design. Eight of the 21 public high schools in the Ika South Local Government Area of Delta State of Nigeria were identified using targeted sampling for data collection. The number of teachers in the eight schools is 201. 75 teachers (50 male, 25 female) from 8 schools were selected through sample application. This study was guided by three research questions. This tool is a researcher-designed questionnaire. The tool was tested by two researchers. Internal consistency and reliability were tested using Cronbach's alpha and 0.75 was obtained. The researchers collected the data together with two research assistants. Mean and standard deviation were used to analyze the research questions. The findings suggest that multicultural education in secondary education institutions will reduce diversity problems and strengthen school management. However, the research revealed that teachers do not have the skills to manage multicultural education in schools and that the curriculum does not provide halfschool-level content for many people. Based on the above findings, the following recommendations were made; To integrate multicultural education into the school curriculum, to teach at all levels of education, to reduce or eliminate racism and to act as a bridge for students from many individuals and groups. A desire to build relationships, friendship and peace.