宪法在一国法律体系中处于至尊地位,是其他法律的“母法”,是国家的根本大法。本文从构建和谐社会的高度,论证了宪法要发挥作用,除了宪法必须被人们信仰以及宪法自身的优良品质外,还取决于其他方面的条件。宪法发挥作用的政治条件包括民主、宪政和违宪审查机制的建立。 The Constitution is in the supreme position of the legal system of a country. It is the “mother law” of other laws and the fundamental law of the country. From the perspective of building a harmonious society, this article demonstrates that the Constitution should play its role. In addition to the Constitution must be people’s beliefs and the Constitution’s own good quality, but also depends on other conditions. The political conditions in which the Constitution functions include democracy, constitutionalism, and constitutional review.