The purpose of this study is to analyze the effectiveness of South Korea's tactical nuclear weapons redeployment, which is presented as a de facto solution for North Korea in 2022, which possesses advanced nuclear capabilities, in terms of military crisis management. South Korea's tactical nuclear weapons redeployment can have three implications that it can have a negative impact on the management of military crisis on the Korean Peninsula. First, the redeployment of tactical nuclear weapons will act as a means of hindering accurate communication between the two countries. Second, the redeployment of tactical nuclear weapons will not take into account the intentions and positions of the other country, thus extending the Korean Peninsula to the battlefield of nuclear and conventional weapons threats. Third, the redeployment of tactical nuclear weapons can lead to overlooking the influence of tactical nuclear weapons and increase the possibility of actual use of nuclear weapons, which can sharply increase the possibility of an all-out nuclear war on the Korean Peninsula.