In the convergence media environment, the design of public service advertisements presents the characteristic of interactive development. Aiming at the existing interactive forms of public service advertisements in the convergence media environment, the work aims to explore the design strategy of enhancing the interaction of public service advertisements and enhancing the user participation. Based on the analysis of the current situation of public service advertisements, existing problems of public service advertisements were summed up, and interactive design strategies of public service advertisements were put forward in accordance with the media environment in combination with innovative cases of interactive public service advertisements. In the convergence media environments, the use of behavioral interaction, empathic interaction and situational interaction is an effective design way to realize interaction of public service advertisements. Interactive design can effectively achieve the objectives of public service advertisements such as revealing social pain points, communicating public emotions and even identifying values. Then it can expand the influence and coverage of public service advertisements, realize the organic unity with social development, and have certain enlightening significance for promoting the sustainable development of public service advertisements.