提出了一类在已有证据理论方法中尚未得到有效解决的效用悖论问题,然后给出了一种证据理论的效用分析方法.该方法根据决策者的主观偏好,将专家的意见利用效用信度函数转换成效用信度,效用信度决定了决策者行动的可能性,然后利用证据理论合成公式对效用信度进行综合.给出了效用信度函数的定义及其性质,并给出了一个具体的函数及其合理性证明. This paper proposes a utility paradox which has not been effectively solved in the existing evidence theory and then presents a utility analysis method based on the evidence theory.The method uses the efficiency of the expert’s opinion according to the subjective preference of the decision maker The utility function is transformed into the utility reliability, and the utility reliability determines the possibility of decision-maker’s action. Then, the utility reliability is integrated by the evidence theory synthesis formula. The definition and properties of the utility reliability function are given. A concrete function and its justification.