Legal analysis: the application of early intervention system in self-investigation cases of procuratorial organs. Early intervention system, as a way for procuratorial organs to perform legal supervision functions, has been applied in China's current criminal procedure system for a long time, but it is mainly limited to the early intervention of procuratorial organs in the investigation activities of public security organs. The main way is to consult the public security litigation file in advance and get familiar with the case, so as to arrest and sue quickly. After the revision of the Criminal Procedure Law, the system of procuratorial organs' early intervention has developed, and they can participate in the discussion of major cases by public security organs, put forward feasible suggestions and guide public security organs to handle cases. At present, the system of early intervention has become an important way for procuratorial organs to perform their investigation and supervision functions, which will play a positive role in handling cases objectively and fairly.
Legal basis: Article 8 of the Criminal Procedure Law of People's Republic of China (PRC) People's Procuratorate exercises legal supervision over criminal proceedings according to law.