Abstract: In recent years, public security situation and criminal structure in China have undergone major changes; therefore, crime governance needs to conforms to the criminal structure and transforms to petty crime governance. In the transformation, the cooperation between the procuratorial organs and the public security organs is the key. In order to further improve the relationship between prosecutorial organs and the police, the investigation supervision and cooperation mechanism emerged. The new era endows the mechanism with new connotation and mission, highlighting the supervision and guidance functions of the procuratorial organs, and emphasizing the two-way cooperation between the prosecution and the police. The mechanism has unblocked the channels for control of the source of petty crimes, improved the quality of petty crimes cases and the effectiveness of supervision. However, we cannot ignore the problems in the management of petty crimes, such as insufficient diversion of cases in the stage of investigation and high rate of light punishment after arrest. To give full play to the cooperation role of the prosecution and the police, and to promote the effective governance of petty crimes cases under the investigation supervision and cooperation mechanism, the prosecution and the police should strengthen the control of the entrance of the criminal procedure, and improve the application of non-detention compulsory measures with the support of science and technology.

Key words: investigation supervision, cooperation, governance of petty crimes, relationship between prosecutorial organs and police