Abstract: The special characteristics and logic of Marxist mission-oriented political party is a line running through the 20th National Congress of the Communist Party of China(CPC). The CPC's character traits of being loyalty and initiative, of adhering to people-centered and people-first philosophy; the development traits of righteousness and innovation, openness and inclusiveness; the action traits of daring to fight and achieving missions, of undertaking self-reform and of exercising full and rigorous party self-governance have been further demonstrated. As a Marxist mission-oriented party; the "Two Combinations" further completes the CPC's theoretical logic, the "Advancing the rejuvenation of the Chinese nation on all fronts through a Chinese path to modernization" further mainfests the CPC's historical logic, and the "self-reform of the Party leading the Chinese social reform" further shows the practical logic. Demonstrating the special characteristics and internal logic of mission-oriented party of the CPC has great significance for understanding the spirit of the 20th National Congress of the CPC.