Abstract: Information transparency is critical to governance of major public health crisis. The significance of information transparency not only derives from whether information is disclosed，but also how information is disclosed. This paper examined government information disclosure during the first wave of COVID-19 pandemic in China. It aimed to explore the possibility from information disclosure to effective information transparency. The research analyzed three dimensions of information disclosure of 31 provincial health department：the accessibility of information, what is disclosed, and how information is disclosed. Based on the analysis and practice，this paper proposed a practical framework regarding how to achieve effective information transparency in major public health crisis.

Key words: information transparency, information disclosure, major public health crisis, governance, COVID-19