Crimes against security is one of the crimes in criminal law that has always been a subject of discussion. In this treatise, an attempt has been made to examine the principles and criteria of criminalization in Iranian law. The current thesis is descriptive and analytical, and it has been investigated using the library method. The results showed that the necessity of maintaining the government and maintaining public order, the principle of expediency and benefit, maintaining the Islamic system and the importance and impact on society are the most important criteria for criminalizing crimes against security in Iran's criminal law. The principle of legality of crime and punishment, the principle of personal responsibility, the principle of non-expansion of criminalization, the principle of non-criminalization of criminal thoughts, the principle of non-criminalization of preliminary acts, the principle of proportionality of crime and punishment and the principle of individualization of punishment are the most important principles governing the criminalization of crimes against It is security. The importance of the order and security of the society, in the opinion of the legislator, is so much that in the Islamic Penal Code, crimes under the title of crimes against national security or actions against national security have been foreseen and punishment has been considered for them.