[Purpose/Significance]This study aims to systematically investigate and analyze open access actions of multiple subjects in the context of major public health emergencies,and summarize experience and deficiencies,which will provide references for their decision-making optimization.[Design/Methodology]Combined with literature research and online survey,the paper defines the types of open access actors of scientific communication system in typical major public health emergencies,and analyzes their open access actions in recent years,including joint initiatives and special measures.[Findings/Conc...