The purpose of this study is to re-verify the direct effect of a low level of cultural acculturation on the delinquency of adolescents from multicultural families, and to empirically analyze whether social support factors buffer the relationship between the level of cultural acculturation and delinquency in this influence relationship. For the empirical analysis, data from the 5th year of the Multicultural Adolescents Panel Study (MAPS) collected by the Korea Youth Policy Institute was used. 1,347 youths participating in the 5th year were used for statistical analysis, and the contents related to the scale used in the statistical analysis were presented in the User Guide for Multicultural Youth (MAPS) 1st-8th surveys of the Korea Youth Policy Institute (2020). As a result of the study, first, teacher support among the types of social support in the delinquency experience of adolescents from multicultural families was verified as a major protective factor reducing the level of delinquency experience. Second, it was verified that adolescents from multicultural families with high multicultural receptivity had a higher level of delinquency experience, which was explained by the negative effect of implicit antipathy toward adolescents from multicultural families in South Korea. The results of this study suggest the need for follow-up studies that reflect the characteristics of the first and second generations of domestic immigrants by suggesting the positive relationship between multicultural acceptability and delinquency as a result of disproving the theory of cultural acculturation, making the type of multicultural acceptability more concrete in the future. Finally, policy suggestions and limitations of this study are discussed.