In the context of social governance innovation, the integration and sharing of information are studied through the construction of an information-sharing platform. The process of interpreting the evolution of new media information dissemination includes analyzing the characteristics and laws of information dissemination on various platforms. Based on the existing scale of public welfare charities, the kinetic evolution equation of the public welfare information dissemination model is established to describe the dissemination process of public welfare information and its influencing factors. The impact of media intervention on the final scale of public welfare information dissemination is analyzed using the collected Facebook dataset as the background, and it is found that the higher the media credibility is at t = 4, the public welfare information attracts media attention. After the release of public interest information, the immunity node began to show a gradual upward trend, reaching a maximum of 1.0. Indicating that after the media release of public interest information, the final scale of dissemination of public interest information increases.