Peacekeeping and humanitarian are of the most important goals and programs of the UN and it is the most important universal international organization .The UN Security Council is the most important pillar and its duty keep international peace and security. This pillar has a special privilege that is its name Veto and It is belonging to the five permanent members of the Security Council. And due to the important duty of this pillar a question comes to mind that What is the role of veto in peacekeeping and Promotion of humanitarian law in the world today? and when we studied issue intensity we understand The veto has been a means for authoritarian purposes its users and Often been hinder peacekeeping and humanitarian law .It is essential for international community members that try to limit the powers of veto owners when they want to use of the veto.