设计了一个基于能力期权契约的应急物资采购模型,政府作为唯一的采购方期初向一个合约供应商采购实物储备量,并向供应商购买一定量的生产能力期权,一旦在期权执行期内有应急物资需求发生,可立即将供应商储备的生产能力转化为实物产品.通过推导和算例模拟证明,这样的采购机制任大量减少政府应急物资实物储备量的同时,降低了政府的缺货风险.同时,也合理补偿了灾后供应商被安排突击生产应急物资发生的成本,应急物资供应链实现了协调,供和需双方实现了双赢. An emergency material procurement model based on the CAPA is designed. The government, as the sole purchaser, purchases physical reserves from a contracting supplier in the beginning of the period and buys a certain amount of production capacity from the suppliers. Once the options are exercised, The demand of material resources can be immediately transformed into the production capacity of the supplier’s reserve.By the deduction and numerical simulation, this kind of procurement mechanism can reduce the government’s stock-out risk while reducing the physical reserves of government emergency supplies. At the same time, it also reasonably compensated for the cost incurred by the post-disaster suppliers in arranging the production of emergency supplies. The supply chain of emergency supplies achieved coordination and the supply and demand sides achieved a win-win situation.