The issue of polarization has become more serious across society. Polarization involves social conflicts and deepens social inequality. The purpose of this study is to investigate the Catholic Social Teaching about polarization and suggest the role of Catholic education in the polarized society. The questions of the research are as follows. First, what is the meaning of the polarization phenomena and what are the causes of the polarization? Second, what are the suggestions of the Catholic Social Teaching about polarization? Third, what are the Catholic educators’s role based on the Catholic Social Teaching? This research has reviewed the Catholic Social Teaching documents and previous research literature. The causes of the polarization are economy of exclusion, idolatry of money, financial system which rules rather than serves human, inequality which spawns violence, and cultural challenges. To overcome the polarization, Catholic educators need to understand and try to practice as follows; the Catholic’s view about the society, the value of justice, solidarity, and the common good. Based on the Catholic Social Teaching, Catholic educators are encouraged to practice dialogues for self-transcendence, to further practice of pedagogy of communion, to seek for unity, to deepen the identity of Catholic education, and active education toward sense of responsibility.