The invention relates to a lower uterine segment hemostat, and belongs to the technical field of a medical device. The lower uterine segment hemostat provided by the invention can cover and immobilize entire cervix uterus and lower uterine segment and can take an effective hemostatic effect; and meanwhile, by arranging a locating clip, an external cervical orifice in the tail end of the lower uterine segment can be accurately located and immobilized, so as to facilitate a hemostasis operation and to improve the hemostatic effect. Moreover, the hemostat is provided with a tightening belt, so that the tightness degree of the hemostat can be controlled and regulated, and the lower uterine segment can be effectively contracted and blood vessels of the lower uterine segment can be compressed so as to achieve a combined hemostasis purpose. When the lower uterine segment is well contracted and a bleeding amount is reduced, the hemostat can be taken down more easily, and the cervix uterus and uterus tissues can be protected from being hurt.