This study examines the determinants of institutional political participation among street-level bureaucrats in China within the context of digital government transformation, guided by an integrated theoretical framework combining Resource Mobilization Theory and Political Opportunity Structure Theory. These theories help explain how both the availability of resources and the broader institutional opportunities influence participation behaviors. Using CGSS 2021 data, which employs a stratified multi-stage probability sampling method to ensure nationwide representativeness, the research assesses how sociodemographic, socioeconomic, and digital factors impact voting behavior and broader political engagement among bureaucrats. The study highlights that digital participation and digital skills significantly increase the likelihood of institutional engagement, particularly among younger bureaucrats. In contrast, those with higher socioeconomic status are less active in traditional voting but more engaged through digital channels.