In order to solve the problem that domestic special anesthesia gun has poor concealment and cannot adapt to various combat environments, a portable special anesthesia gun is proposed. The overall scheme and working principle of the injection bullet of the anesthesia gun are given, the 3D model of the injection bullet is established, and the key components of the injection bullet are analyzed by finite element simulation software and verified by experiments. The results show that the structure design is reliable, the principle is feasible, and the expected goal can be achieved.