To effectively evaluate the performance of emergency logistics suppliers，a method for evaluating emergency logistics suppliers was proposed based on supplier evaluation，incorporating prospect theory and interval numbers. Firstly，based on the characteristics of emergency logistics，an evaluation index system for emergency logistics suppliers was proposed from six dimensions: rapid response capability，cost control capability，product quality，delivery service，internal and external conditions of the enterprise，and flexible demand. Then，interval numbers were introduced into the evaluation of emergency logistics suppliers，and an evaluation method based on prospect theory and interval numbers was proposed. The Jaccard similarity coefficient was used to define the similarity of interval number. The maximum sum of similarity with the remaining solutions was used to determine the reference point of the value function for the attribute evaluation value of the corresponding solution. The deviation maximization theory was used to construct a multi-attribute decision weight optimization model based on interval number similarity，from which attribute weights were obtained. Finally，the value function was normalized to expand the scheme discrimination. The prospect value of each scheme was calcuted based on the obtained weight function and value function，and the advantages and disadvantages of the scheme were ranked. The research results indicate that the difference in prospect values between the optimal and worst suppliers calculated using the evaluation method is 0.383 8，while the prospect value difference calculated using statistical inference principles is 0.085 6. The difference of 0.298 2 shows that the proposed evaluation method expands the differentiation between options，helping decision-makers achieve effective decisions.