Abstract: Since the Open and Reform, Deng Xiaoping, on grasping the national conditions of China and the global conditions, made great efforts to combine the essential principles of Marxism and the reality of China, fully respected the thoughts of the people and designed the routes of PRC's political power legitimization, which lie in the following four aspects: the construction of ideology, the maintenance of economic benefits, the reform of political system and the exaltation of political quality. To fully understand Deng Xiaoping's thinking route of political power legitimization has great significance in scientifically recognizing the process of modern China's political development.