As the symbolic carrier through which the Communist Party of China （CPC） articulates its political stance， values and strategic propositions， the Party’s publicity discourse must be continuously expanded in content and optimized in form in response to changes in historical context as well as shifts in its publicity goals and tasks. Taking the successive National Publicity Work Conferences as the research focus， this study reveals that the evolution of the CPC’s publicity discourse since the founding of the People’s Republic of China has undergone three distinctive stages， characterized respectively by “political mobilization” discourse， “ideological emancipation” discourse， and “cultural confidence” discourse. During this period， the Party’s publicity discourse has been constantly adjusted and improved in terms of its functions， content and expressive strategies. The underlying logic behind such iterative evolution of discursive symbols and expressive forms lies in the profound adaptation of the Party’s publicity discourse in its theoretical foundation， value orientation and practical direction. This suggests that in the innovative practice of the Party’s publicity discourse in the new era， it is essential to uphold the fundamental stance of the dialectical unity of the Party spirit and the people’s nature， continuously activate the core driving force of upholding fundamental principles while pursuing innovation， focus on the overall situation and the Party’s central work， deepen content development and innovate ways of expression so as to maintain the vitality and effectiveness of publicity discourse.