Citizenship became part of the compulsory courses of secondary schools in England in 2002. The guideline was revised in 2014. Fierce academic debates shaped the curriculum reform. Political theory of political conflict mediation and political participative equality played an important role in promoting the legalization of Citizenship education. The wide acceptance of social capital theory also helps to win the necessary support. The current curriculum is a mixture of various ideologies such as socialism, republicanism and communitarianism. This multi-feature provides both pragmatic conditions for the curriculum’s legalization and challenges for its implementation.