Based on the common index system of performance evaluation of supply chain and the characteristics of modern warfare ordnance maintenance equipment supply chain, the current study established the index system of performance evaluation of ordnance maintenance equipment supply chain during wartime from source, output and flexibility. Considering the information is fuzzy and uncertain under the environment of war, the evidence theory model was established to evaluate the performance of ordnance maintenance equipment supply chain. Finally, a wartime ordnance maintenance equipment supply chain was explored as a case study, using the index system and the evaluation model which was established earlier to study its performance. The result shows that the performance evaluation model of ordnance maintenance equipment supply chain during wartime is feasible and effective.