This article examines the macro and micro principles of criminal policy in Iranian law and analyzes various approaches including legislative, judicial, participatory, preventive, and restorative policies. In the macro principles section, legislative criminal policy emphasizes the role of lawmaking and the drafting of penal regulations; judicial criminal policy focuses on the administration of justice by courts and judges; participatory criminal policy centers on the involvement of civil society and public institutions; preventive criminal policy aims to prevent crime through education and addressing risk factors; and restorative criminal policy seeks to repair the harm caused to victims and facilitate the reintegration of offenders into society. The micro principles section highlights concepts such as the legality of crimes and punishments, the personal nature of punishment, proportionality between crime and punishment, and individualization of sanctions. These principles are designed to ensure justice, preserve human dignity, and prevent arbitrary punishments, thereby playing a significant role in enhancing public trust in the criminal justice system. Ultimately, the article concludes that establishing an effective and fair criminal policy system requires simultaneous attention to both macro and micro principles, active community participation, and the adoption of modern approaches such as restorative justice. This integrated approach can reduce criminal behavior and contribute to improving security and social justice in Iranian society.