Military doctors are both loyal soldiers and humanitarian medical workers. In the war, how to establish the priority of treatment, how to reasonably allocate medical resources, and the battlefield selection method，It is the principle of every medical worker to do his best to save lives, but battlefield medics need to perform euthanasia to ease the pain of war on individuals，Prisoners of war are denied proper medical treatment and humane treatment, All three factors are a source of moral injury for military doctors in war.