Using Imam Khomeini’s ways of thinking, parameters can be achieved that can strengthen the Country’s political security. These parameters also cab produce a political stability and sustainable security. This article tries to scrutinize the political security parameters in Imam Khomeini’s thoughts. The main question in this article is "What are the internal and external parameters of political security as thought by Imam Khomeini?". The findings of this research indicate, firstly that, preserving the political regime, strengthening the institution of clergymen, tending to abide by the laws, defending Islam, social integrity, public presence and participation, mutual loyalty between people and the authorities in charge, rejecting monopolism, and the sovereignty of law and order are among the internal parameters of political security. And, secondly that political independence, peaceful coexistence, rejecting oppression, establishing independent international organizations, supporting the oppressed nations and watching for the international organizations are considered foreign parameters of political security in Imam Khomeini's thinking. To answer the questions above, documentary studies and descriptive-analytical method are used where the 22 volume Imam Khomeini's Sahifa are used as the main authority for studying Imam's ways of thinking.