The purpose of this research is examination and analysis of the UN performance in settling the Afghanistan crisis from 1979 to the end of 2021 which has been conducted using the descriptive method based on collecting data through looking into the archived sources of the UN and with the Descriptive-Analytical method. The paper intends to answer the question, How has the UN performance been in solving the Afghanistan crisis? The thesis of the research is indicating that, though the UN as one of the most influential international governmental institutions, has made great efforts to resolve the Afghanistan Crisis using  its main institutions like the Security Council, the General assembly and the General Secretary , and by implementing and executing the legal measures, under the resolutions 6 and 7 of the UN Charter , as well as political measures by the general secretary and his special envoy , and Institution-Building through supervising the execution of the resolutions and measures for settling the Afghanistan crisis , in resolving the crisis in Afghanistan it has not been completely successful. The findings of this research have been examined using the Michael Brecher rules and principles of the analytical model of the international crises, and are indicative of the fact that the UN, despite enjoying high levels of independence and legitimacy on the international level, has not had a successful performance in resolving the Afghanistan crisis, and has acted passively and non-strategically, due to its structural weakness and substantive dependence.