After the victory of the Islamic Revolution, the administration of the government, within the framework of the basic rules of Sharia, in practice, faced deadlocks that could not be overcome except by going beyond the appearance of Sharia. This issue required new ijtihads that were carried out by Imam Khomeini. Thus, a special formulation of the relationship between laws and sharia led to the formation of a political system in a different way. In this article, focusing on Imam Khomeini's political thought and using descriptive-analytical method, we seek to answer the question: what are the theoretical mechanisms for the challenge between Sharia and laws in Imam Khomeini's political thought? An analysis of Imam Khomeini's political thought led to the answer that Imam Khomeini (ra) with a special jurisprudential reading through concepts such as government rule and the principle of expediency, secondary rules, and the "absolute" rule of the jurist presented a mechanism to resolve the challenge between Sharia and law.