This paper studies the modeling and solving method of echelon usage problem of equipment measured by dual-life indexes and one of them cannot be controlled in the case of uncertain task quantity and consumption.The decision-making model of echelon usage problem of dual-life equipment under uncertainty is constructed.The maximization of the echelon uniformity index,life matching index and life utilization index is taken as the objective.The I-NSGA-Ⅲ is used to solve the problem.The improved segmented coding method and operators are adopted,and the repeated individual control mechanism is introduced to improve the diversity of the population.When the scale of the problem is large,the search of a larger range in a shorter time can be realized,which verifies the feasibility of this method.