One of the basic challenges of the law of war is new weapons. Weapons such as electromagnetic weapons that operate at the speed of light are deadly and torture people. The purpose of this article is to examine the question of what is the legal status of electromagnetic weapons in the light of jurisprudence and international humanitarian law? The current article is descriptive and analytical and has investigated the mentioned question by using the library method. The results indicate that in humanitarian law, the principle of separation of civilians from the military, the principle of proportionality in the use of weapons, the principle of prohibition of unnecessary suffering and the principle of non-destruction of the environment prevail. In jurisprudence, the mentioned principles have been emphasized. There are no special rules regarding the use of electromagnetic weapons, but from the point of view of jurisprudence and international humanitarian law, the use of electromagnetic weapons is subject to compliance with the emphasized principles, which are accepted as mandatory rules in the law of war. In fact, the use of these weapons is permissible when it is possible to separate civilians from the military, does not create a pointless and unnecessary war on the military, is used in accordance with the enemy's intentions and does not cause damage to the environment.