In Afghanistan and Iraqi war, the war mortality has been greatly reduced due to the upgrading of United States medical technology and equipment and the optimization of the rapid evacuation of the wounded. With the improvement of survival rate, pain management is more important in the combat casualty care in United States army. The United States army implements a grading pain management strategy in the 5-level combat casualty care system, which may be an important reference for Chinese military. This paper reviews the current pain management for combat casualty care of United States army, analyzes the advantages and disadvantages of therapeutic drugs and protocols, and highlights the enlightenment on improving pain management in Chinese military in future.