For effectively evaluating the ordnance maintenance material supply chain, it adopted the self-organization feature map to evaluate the performance of the supply chain. According to the balance score card (BSC) theory, the paper articulated the six key factors which effected the ordnance maintenance material supply chain. Furthermore the SOM model was established. 24 samples vectors, which were composed of the grades of the 6 factors, were classified into 4 sorts (including great, fine, middle, and common) through the SOM, and the evaluating standards were established. At last, feasibility and reasonability of the model were demonstrated through this illustration.