提出模糊加工时间调度问题，隶属函数建立在工件的模糊加工时间上，隶属度表示工件在一段加工时间下属于完工集合的程度．在假设工件的隶属函数是单调递增的情况下，分析了多个工件所迭加的联合隶属函数所对应的性质．根据这些性质研究了一种单机模糊加工时间的调度模型． The fuzzy machining time scheduling problem is proposed. The membership function is built on the fuzzy machining time of the workpiece. The membership degree indicates the degree of the workpiece belonging to the finished set at a certain processing time. Assuming that the membership function of the workpiece is monotonously increasing, the properties of the joint membership functions superposed by multiple workpieces are analyzed. According to these properties, a scheduling model for single machine fuzzy machining time is studied.