The criminalization of money laundering in Iranian law, which is aimed at combating illicit financial flows, is in conflict with the fundamentals of jurisprudence and the constitution, as well as the principles of criminal justice and politics, and faces serious challenges. The findings show that preventing and reforming the conditions for money laundering and paying attention to the role of regulatory institutions in criminalizing it can be a more effective solution to prevent the spread of this phenomenon, because its criminalization leads to conflict with legal and jurisprudential principles, including Article 4 of the Constitution, which leads to acquittal and double punishment. This study, using a descriptive-analytical method and using domestic jurisprudential and legal sources, criticizes the criminalization of money laundering punishment, and considers the civilization of its punishment to be more appropriate in order to resolve conflicts and combat and prevent money laundering. This approach, while ensuring deterrence, is also more consistent with the fundamentals of jurisprudence and the requirements of the constitution, politics, and criminal justice.