由于磷肥产销量受季节影响而变化，故建立了企业大宗原材料最优化管理的数学模型，应用最小值原理，求得该数学模型的解析解。计算结果表明该模型对磷肥企业的现代化管理工作是有益的。 Since the production and sales of phosphate fertilizers are subject to seasonal changes, a mathematical model for optimal management of bulk raw materials for enterprises has been established. The analytical solution of the mathematical model has been obtained by applying the minimum principle. The calculation results show that this model is beneficial to the modern management of phosphate fertilizer companies.