Abstract: 【 Purpose/significance】 Relying on big data technology to build a digital platform for party building in universities is becom⁃ ing an important way to promote party building, innovate party building in universities and enhance the information service ability of party organizations in the new era.【 Method/process】Based on the background of the era of big data, this paper analyzes the basic char⁃ acteristics of the digital platform for party building in universities, and summarizes the practical obstacles in the construction of the digital platform for party building in universities. Based on the idea of data-driven, a six-layer bidirectional digital platform system for Party building in universities is constructed, which includes "user layer, display layer, access layer, service layer, data layer and hard⁃ ware layer", and the core functions and implementation approaches are analyzed and designed in detail【. Result/conclusion】 The digi⁃ tal three-dimensional party building platform can achieve the goal of providing comprehensive services for party member, a teacher and student at school.【 Innovation/limitation】 This paper is a relatively macro research on the construction of digital platform for party building in universities from the perspective of big data, and it needs to be further analyzed and improved at the micro level with corre⁃ sponding cases in the later stage.