Administrative public interest litigation has endogenous and exogenous necessity for personal information protection，and has broad institutional space in legislative technology，legislative protection and policy support. However，in practice，there are still some defects in the administrative public interest litigation of personal information protection，such as insufficient supply of supporting mechanisms，lawmaking anomie，unclear related concepts and lagging legal supervision. In view of this，we should take the “three values” of administrative public interest litigation as the guidance，and achieve “two expansions and one improvement” from the three aspects of protection scope，supervision space and supporting mechanism，so as to build and improve an effective system of administrative public interest litigation for personal information protection.