As a new kind of intellectual property rights object, a “three-way protection” mode has been formed under the “Trademark Law” system, collective trademark protection and special law protection of “Measures for the protection of geographical indications products” and “Measures for the administration of geographical indications of agricultural products”. This protection mode has resulted in the distortion of the design of the “geographical indication” right confirmation and protection system, the lack of cooperation and support for each other, the coordination block in the management process of various institutions, and the difficulties in the protection of geographical indication rights. Public interest litigation, as a litigation method to solve the “tragedy of common land”, is also applicable in the field of geographical indications. To intervene in the protection of geographical indications by means of procuratorate filing or supporting other subjects to file lawsuits can quickly and effectively solve the problems of chaotic management, low litigation efficiency and difficulty in safeguarding rights in the protection of geographical indications. This paper takes the typical case of “BaiJiao sea bass” issued by the Supreme Procuratorate as an example, specifically analyzes the positive role of public interest litigation in the protection of geographical indications and the feasibility of this model, and explores the protection path of geographical indications with actual cases.