Corruption, especially administrative corruption, has adverse effects on various dimensions of human society's life and is one of the main problems facing the world's political systems. The ratification of the United Nations Convention against Corruption Merida 2003 is an international confirmation of this. In the legal system of Iran, by joining this convention, various measures have been taken in the two dimensions of preventing administrative corruption and dealing with it criminally. In addition, Iran's legal system has also paid attention to international cooperation to fight corruption. According to the results of the research, there are still serious problems in some areas to effectively fight corruption, and the most important problems in this field is the lack of criminalization of administrative corruption. In the private sector, the non-adoption of differential criminal procedure for administrative corruption crimes, the absence of a comprehensive national program for the prevention of administrative corruption, the existence of parallel regulatory institutions and the lack of detailed explanation of their duties, are the lack of serious attention to the internal control system. Therefore, It can be said that Iran's legal system does not have the necessary coherence and coordination in the field of dealing with administrative corruption. Solutions to improve and promote the fight against corruption in two theoretical, research and practical formats should be considered. Solutions such as local and comparative research on the root corruption, including the large size of the