缘起于美国的刑事认罪协商制度不仅具有程序性利益,更具有实体法上的价值,已成为现代法治国家重要的司法制度设计。文章认为认罪协商程序下的刑罚限度与刑罚目的理论关系紧密,二者具有诸多的契合性,我国构建刑事认罪协商制度应当以适当的刑罚目的论作为有效地理论支撑。 The system of criminal confession consultation originated in the United States has not only procedural benefits but also substantive law value, which has become an important judicial system design in modern law-governed countries. The article holds that the limit of punishment under the process of plea bargaining is closely related to the theory of purpose of punishment, and the two have many conformity. The consultative system of criminal confession in our country should be supported by an effective theory of purpose of penalty.