Abstract: The mathematical methods of theoretical analysis to determine some unknown or omitted parameters in combat efficiency theory of military aircraft based on the present models of combat efficiency of airforce equipment and the actual data of military operation are introduced in order to develop or improve the theory with practical work and some new concepts, such as combat efficiency and actual efficiency among airforce mission.For example,the combat efficiency usually comes from academic research and could be also called appraisal efficiency or static efficiency.After modified with actual data of military operation of past records which also could be seen like actual combat efficiency,confrontation efficiency and dynamic efficiency.Through calculation and analysis it must be noted that the numerical value of actual combat efficiency is larger or much larger than the value of combat efficiency.