Aimed at the problem that supplier selection method of military enterprises is not comprehensive yet, this paper proposes a supplier selection method for military enterprises based on the prospectregret theory. The requirements of military enterprises and the characteristics of military products are analyzed, and the evaluation indexes suitable for supplier selection of military enterprises are constructed. Considering the hesitation psychology in expert evaluation, probabilistic hesitation fuzzy set is introduced to describe the evaluation information. Based on the prospectregret theory, the risk attitude and regret avoidance psychology of decision makers are described and the evaluation information of the supplier scheme is aggregated.The evaluation results of the schemes are obtained and ranked. The scientificity and rationality of the proposed method are verified by a numerical example and contrast analysis.