Based on information lifecycle theory，the paper analyzes the privacy policies of 15 mobile applications and mini apps，which are closely related to COVID-19 prevention and control. In information created stage，when users have not produced data yet，most mini apps lack of privacy policies and the posting locations are not obvious compared with apps，which make users find it inconvenient. After users’ data creating，there are still some problems in next four stage，including information collecting，storing，sharing and using. Most applications are incomplete in their descriptions of information collection rules，retention time，data sharing，cross-border transmission issues，and users’ information control rights.