Aiming at the deficiency of the existing fire efficiency evaluation of terminal sensitive projectile, a mathematical model of fire efficiency evaluation was established based on the number of damaged targets and ammunition consumption, and the fire efficiency of terminal-sensitive projectile under different conditions was calculated with an example. The results show that the model can be used to evaluate the firing efficiency of terminal sensitive ammunition in command and control system and fire control system, and can meet the commander's decision demand of ammunition quantification. It has important reference value for improving the combat level of new ammunition.