Abstract: Political firmness comes from theoretical sobriety. Adhering to theoretical innovation is the valuable experience of the CPC's one hundred years of struggle. In the practice of revolution, construction, reform and opening up, the Communist Party of China has upheld theoretical innovation and made great leaps in adapting Marxism to China. The great achievements of the CPC in one hundred years of struggle and theoretical leap are to adhere to the guiding position of Marxism, adhere to the basic principle of Marxism with China's concrete reality combined with the Chinese excellent traditional culture, adhere to emancipate the mind seeking truth from facts, and advancing with the Times, practical, and adhere to the theme of realizing the great rejuvenation of the Chinese nation, timely answering the Times and the people. In the new era and a new journey, we need to promote theoretical innovation in strengthening the leadership of the Party and advancing the great new project of Party building, in the process of modernizing China's governance system and capacity, and in promoting new forms of human civilization to provide Chinese wisdom for global governance.