本文指出共同犯罪是一种复杂的现象,对正犯和帮助犯区分是为了指导司法实践,犯罪人在其共同犯罪中的作用坚持以客观判断,以此来确定量刑,才能达到罪刑均衡。 This article points out that the crime of common crime is a complex phenomenon. The distinction between the principal offender and the helping offender is to guide the judicial practice. The offender ’s role in his joint crime is determined by objective judgment so as to achieve the balance of crime and penalty.