The discourse of whole-process people’s democracy includes value, theoretical and practical discourse. The discourse of whole-process people’s democracy expresses the core connotation of whole-process people’s democracy, that is, the core issue of “people-centeredness”. The value discourse, theoretical discourse and practical discourse all revolve around the core issue of “people-centeredness”. Based on the material, dialogue and sharing properties of communication, the self-media platform plays the important roles of ideological material carrier, dialogue field for meaning interpretation, amplifier and loudspeaker of political influence in the process of spreading and constructing the whole-process people’s democratic discourse. The process of spreading the whole-process people’s democratic discourse by the self-media is the process of public understanding, acceptance and diversification of the whole-process people’s democratic discourse. The discourse of whole-process people’s democracy cultivates political psychology, shapes the value order and coordinates the balance order through self-media communication, reconstructs the political discourse order, mediates the discourse of whole-process people’s democracy, and gradually realizes the political goal, political vision and political expectation of whole-process people’s democracy under the premise of adapting to the law of network communication. In the discourse order of the whole-process people’s democracy constructed by self-media communication, the identity, relationship and conceptual functions of the discourse are brought into play to strengthen the identity of the whole-process people’s democracy, maintain the social stability of the whole-process people’s democracy and shape the maintenance of national political security. Self-media communication thus promotes the positive interaction of the development of the whole-process people’s democracy, democratic political stability and political and social progress, enhances the cohesion and centripetal force of politics, and thus continuously promotes economic prosperity and social harmony and stability.