Abstract: 【Purpose/significance】Use the new generation of digital technology to innovate the grassroots party building work, effec⁃tively promote the organic combination of the scientific and technological power and the ruling power in the era of big data, and com⁃prehensively improve the service and management efficiency of grassroots party organization.【Method/process】With reference to the research method of combining theory and practice, this paper summarizes the development trend of grassroots party building from tradi⁃tion to informatization and then to digitalization, deeply analyzes the core influencing factors of the party's digital construction at the grassroots, and then constructs a scientific system of grassroots digital party building【. Result/conclusion】On the basis of analyzing the digital development status of grassroots party building in the era of big data, it is found that the overall management ability, investment
guarantee strength, digital technology conditions and thinking and cognition level are the core elements affecting the digital develop⁃ment of grassroots party building.【Innovation/limitation】Taking the influencing factors as the main consideration, a more systematic and three-dimensional digital system of grassroots party building is constructed from the four dimensions of top-level design, invest⁃ment mechanism, service platform and operation system to promote the digital development process of the party at the grassroots. How⁃ever, due to insufficient data samples, there is still room for refinement in this study.