The prosecutorial reform involved two aspects，namely the reform of the system and that of the mechanism.The on-going reform carried out within the prosecutorial power itself touched mainly upon the working mechanism.Under the same idea that has been developed in recent years，the reform in 2007 proceeded along two directions：the strengthening of both inside and outside supervision.Specifically，the outside supervision referred to the legal supervision power upon law enforcement，whereas the inside supervision emphasized the regulation of the prosecutorial implementation of law.The criminal policy of combining the use of lenient and harsh punishment played an important leading role in the reform of 2007，for it well achieved the objective of serving the construction of a harmonious society，especially in dealing with the death penalty cases and the criminal cases of juvenile，and in the reform of speedy processing of minor criminal cases.That the practice of tightening the supervision upon lower procuratorates by the higher ones and the formation of the supervisory system within prosectorial work strengthened the mechanism of inside supervision.Meanwhile，the establishment of the criteria in the budget guarantee for grassroots procuratorates well promoted the reform with regard to the protection of the performance of prosecutorial work.