已有关于梯形需求的产品库存问题多集中在单一货栈的框架内讨论,而这一需求类型的两货栈问题还鲜有被研究.对此,在允许缺货的条件下,考虑租用货栈以及拖后延迟补货的情况,建立了以系统平均成本最小为目标的两货栈库存模型,从而将现有基于梯形需求的库存问题作了进一步扩展.然后分析了此类库存系统最优策略的存在性和唯一性,并提供了求解模型的算法,最后用数值例子和敏感性分析对所建模型进行了说明. There have been many discussions about the problem of trapezoidal product inventories concentrated in the framework of a single warehouse, and the two types of warehouse problems of this demand type are rarely studied.In this regard, under the conditions of allowing out of stock, consider the rental warehouse and drag After the replenishment was postponed, the inventory model of two warehouses with the minimum system average cost was established, which further expanded the existing inventory problem based on the trapezoidal demand.And then, the existence of the optimal strategy of such inventory system was analyzed. And uniqueness, and provides an algorithm for solving the model. Finally, numerical examples and sensitivity analysis are used to illustrate the model.