Theoretical innovation is an important proposition that runs through the 6th Plenary Session of the 19th Central Committee of the Communist Party of China, as well as a valuable historical experience obtained by the Partys hundred years of struggle. Since the 18th National Congress of the Communist Party of China, remarkable achievements have been made in theoretical innovation and practical exploration of party building, as are embodied in the new concept of “original aspiration and mission”, the institutional advantage of the Partys overall leadership, the dominant position of the Partys political construction, the new concept of coordinating ideological party building with systematic party governing, the new definition of the partys organizational line, the optimization and development of the general layout of Party building, the strategic thinking of strengthening the Party with quality, and the strategic layout of comprehensively and strictly governing the Party, which are an organic whole of system integration and reflect the new progress and systematization level of party building theory in the New Era. So strengthening the theoretical interpretation of these innovations is a must for studying and implementing the spirit of the Sixth Plenary Session of the 19th Central Committee of the Party and continuously advancing the great project of Party building.