研究了多货栈及变质情形下两种可替代物品的经济订货批量问题.在计划期内,若某一种易变质物品发生缺货,则可以被另一种易变质物品以一定的替代率代替补充,不同物品有不同的变质率,且要决定租用货栈的数量.以库存系统的总费用最小为目标函数,分别对货栈容量无限与有限的情形建立模型,证明了最优策略存在的唯一性,并分别给出了求解最优订购策略的算法,最后通过一个算例验证了算法的最优性. In the planning period, if a certain kind of perishable goods is out of stock, it can be replaced by another kind of perishable goods with a certain replacement rate And different items have different rate of deterioration, and to decide the number of rented warehouses.Using the minimum total cost of inventory system as the objective function, this paper establishes a model of unlimited and limited capacity of the warehouse respectively, and proves the uniqueness of the optimal strategy , Respectively, and give the algorithm of solving the optimal ordering strategy respectively. Finally, an example is given to verify the optimality of the algorithm.