Modern western economics and Marxism have their own advantages respectively but both of them need the innovation and development, and the innovation of political economics needs the change from systematic innovation to paradigm innovation. National happiness theory has deep ideological source of economics and will certainly push forward the innovative development of economics theory. Chinese scholars have bigger discourse on political economics innovation and should firstly consider the paradigm innovation by using national happiness theory to boost political economics development. National happiness has big theoretical innovation space and the concept on the explanation of new problems, meets the requirement for academic framework of the combination of market and government power, and can open methodology innovation space such as historic stage analysis, mathematical analysis, social survey sample analysis and so on. The national happiness theory with Chinese characteristics abides by mutual innovation path of politicians and theoretical circle and is conducive to paradigm innovation of political economics of socialism with Chinese characteristics.