Abstract: The People's Supervisor System is a key link in the process of deepening the reform of criminal justice in our country. "Deepening the People's Supervisor System reform scheme" aims to strengthen the supervision effectiveness of the procuratorial organs self-investigation cases and improve the level of judicial democratization. It puts forward five aspects of specific reform measures, marking the system into a comprehensive and sound reform stage. However, any reform is not achieved overnight. There is perfect space or room for improvement. This scheme dose not completely resolve the deep-seated problems encountered in the judicial practice, and some provisions are still questionable. So there is an urgent need to improve its contents. In this regard, it is necessary to proceed from planning focuses on the analysis and interpretation and it is expected to promote the comprehensive understanding and in-depth thinking of it.