Abstract: Since the outbreak of COVID-19, citizens􀆳 personal information has been widely collected and applied to achieve joint prevention. Due to the special needs of epidemic prevention in China, it is necessary to implement consent exemption for the collection and use of personal information, and clearly define the scope of the necessity of public interest. However, taking public interest as the legal basis does not represent the legality of the whole behaviour of using personal information, and the specific provisions of personal information protection law must be followed.Finally, this paper proposes specific measures for personal information security protection.

Key words: public interest, consent exemption, personal information security protection