新加坡是一個典型的多元族群國家，不過其境內的各個族群卻在其強大的國家機關控制之下，展現了其和諧的一面。然而，這是人民行動黨政府分別透過政黨（刻意壓制族群政黨的出現）、憲法（提出保護少數族群的條款）、意識型態（提倡多元種族的國家意識）和選舉制度（集選區制度的推行）等有形及無形制度規範之運作，所獲致的重要成果。 由於新加坡目前仍是一個威權體制的國家，其政治、經濟、文化和社會等諸多層面，均受制於其國家機關的強力掌控。因此，新制度論的相關論點正好可以作為解釋新加坡族群議題的依據，本文將根據新制度論的觀點，重新詮釋和分析新加坡族群政策的具體成效。

Singapore is typically a plural ethnicity country. Each ethnic group in the territory keeps harmony with one another under the strong control of the state. The success on the ethnicity harmony, however, resulted from various disciplines of ethnicity, such as party (getting rid of the ethnic-party), constitution (the bill for protecting minority), ideology (plural ethnicity policy), and election institution (Group Representation Constituency) practiced by the ruling PAP (People’s Action Party). Being an authoritarian regime, Singapore has been dominated by the state in the dimensions of politics, economics, culture, and society. Under this situation, the paper intended to analyze and re-interpret the effectiveness of Singapore’s ethnic policy based on the perspective of New Institutionalism.