Criteria for multiple offenses as one of the causes of individualization of punishment, From the beginning of the Iranian legislative movement until today, it has undergone several changes in the scope of cases and the manner of determining and enforcing punishment. The latest change in this area, it refers to the law on reducing the punishment of taimprison which has tried in the light of some innovations and return to some of the criteria contained in previous regulations, including the General Penal Code adopted in 1352, eliminate the shortcomings associated with ta'zir crimes. According to the research findings, the method of which is descriptive-analytical and the data collection tool is library, approach adopted, from such dimensions as abandoning the strict policy of aggregation of punishments for seventh and eighth degree crimes Considered the most severe punishment stated in the lawsuit if suspended, parole and pardon, it is justified. And from other dimensions, such as not copying specific legal cases who, without any special wisdom, have chosen a method other than the general rules for determining the punishment of various crimes, and silence on how to determine punishment when both the crime and the recurrence of the crime occur is unjustified.