Carrying out the capability evaluation and construction of combat support units is an important support for the formation of system capabilities under the informatization condition.Compared with the capability assessment at the level of combat support equipment,the implementation of capability assessment for sub-units will encounter many difficulties,such as more qualitative assessment indicators,strong fuzziness of evaluation criteria,etc.Fuzzy reasoning method has obvious advantages in solving the above problems.Through the steps of fuzzy set assignment,fuzzy modeling of input values, establishment of fuzzy reasoning rules,construction of synthetic fuzzy sets,and defuzzification processing,a fuzzy reasoning-based capability evaluation method for combat support units is established.The method can be easily understood by military personnel and has important military application value.