Abstract Party-building activities in colleges and universities should adhere to the people-oriented, clear work orientation, the establishment of a systematic, scientific, and comprehensive institutional mechanism, to innovate the ways and means of ideological and political work, and to effectively enhance the attractiveness and appeal of party-building activities. This paper takes information fusion technology as the basis, promotes the construction of a three-dimensional platform for party-building information, and proposes ideological and political communication channels for party-building. It constructs an evaluation index system for the level of party-building activities, solves the weight of each index using the improved entropy weighting method, builds a comprehensive evaluation model for the level of party-building activities combined with gray correlation analysis, and introduces a multivariate linear regression model to analyze the specific impact of ideological and political work on the development of party-building activities. Taking University Y as the research object, the effectiveness of the three-dimensional platform for party-building on the development of its party-building activities was analyzed in depth, and a comprehensive evaluation analysis of the level of its party-building activities was conducted. It was found that the level of party-building activities carried out in universities increased by 57.23% between 2014 and 2023, and the quality of party-building activities carried out in universities would be enhanced by 0.648 units for every unit of increase in the level of ideological and political work. Combining the party-building activities of colleges and universities with network informatization and optimizing the form of the development of ideological and political work based on the information technology platform in depth can effectively promote the high-quality development of party-building activities in colleges and universities.