Separation or closeness of Politics and administration is the key or principle place for production of knowledge in public administration area and scopes. In scientific societies of public administration, the degree of politics’ interference in administration named or called "politicization". On the other hand, it is so obvious that there is a degree of politicization in all administrative systems of world’s countries or administrations and there is no country in that, public administration does not execute politicians’ likes. Related to the professionalization degree of bureaucracy, adherence to political wishes is variable. The final purpose of this article is the comparative study and survey of politicization in six European and orth American countries. In this study Researchers using comparative method try to answer these questions, what are the concept, processes and consequences of politicization in Denmark, Germany, France, Britain, United States and Egypt. At the end, politicization in Iran has been viewed that can be a guideline in the international era for our domestic administrators.