Article 70 of Personal Information Protection Law of the People's Republic of China provides a framework for the public interest litigation system of personal information protection. After a comprehensive review of the public interest litigation system of personal information protection combined with legislative norms and judicial cases, it finds that the applicable conditions of public interest litigation of personal information protection in China are relatively general, the rules of the subject of litigation right are not clear, the litigation path is biased, the pre-litigation procedure is not set up comprehensively, the litigation request is relatively single, and the litigation procedure design is thin. In order to give full play to the effectiveness of the system, more legislations should be supplied. Specific measures are suggested as follows: to refine the types of illegal processing of personal information and the requirements for the number of victims; to clarify the relationship between administrative power and procuratorial power; to clarify the order of three types of legal subjects filing information public interest litigation and the qualification conditions for prosecution by relevant organizations; to clarify the relationship between the three types of public interest litigation and establish a mechanism for the selection of litigation types; to optimize the pre-litigation procedure setting from the review of litigation initiation to the follow-up of implementation; to set up new public interest demands of prevention, compensation and recovery; to actively explore the claims for damages and punitive damages in information public interest litigation; and to explore special rules in terms of public interest jurisdiction, proof, mediation, withdrawal of litigation and second instance in accordance with the law in combination with the particularity of personal information protection, so as to promote the good operation of information public interest litigation. [ABSTRACT FROM AUTHOR]