In the battle against the COVID-19，the government and enterprise present series of big data production through the travel，medical and consume to realize all-around and precise of prediction，governing and treatment of the epidemic. During the process，the information such as names，address and family members are closely with citizens’ privacy. We have issued normative documents，established joint prevention and control mechanism，emphasized importance of technology and punished illegal acts of leakage of privacy to balance interests between the public and privacy. As the prevention and control of epidemic becomes regular，we should enhance privacy safety consciousness，promote enforcement of privacy-related law，regulate the work of data including collecting，using and storage，and data interconnection to protect citizens’ privacy better.