“双均数是指平均住院人次费用标准和平均住院日费用标准两个指标对费用的总量控制”。实行基本医疗保险住院费用分科双均数定额管理,观念转变是基础；合理确定双均数定额费用指标是关键；严格的考核是保障；兼顾“医、患、保”三者的利益和降低医疗成本和控制医疗费用是目的。 “Double mean refers to the average cost of hospitalization and the average cost of hospitalization two indicators of the total cost of control.” The implementation of basic medical insurance inpatient expenses sub-fixed-amount management, the concept of change is the basis; reasonably determine the double-average fixed-cost indicators is the key; strict assessment is to protect; take into account the “medical insurance, insurance,” the interests of the three and reduce medical Costs and control of medical expenses are the goals.