本文基于已有的OPC Server 实时任务模型，设计了处理混合任务集的动态调度算法（基于截止期优先）和实现方式。该算法实现了对混合任集可调度性的判断，可以完成有硬实时性要求的非周期性任务和周期性任务的调度，并给出了相应的调度结果。关键词：OPC； 动态调度算法； 最早截止期优先； 绝对完成时间Adetract:The paper is based on the existing real-time task model--OPC Server.It designs andimplements(base on EDF)a dynamic scheduling algorithm,which could deal with hybrid tasks.The algorithm succeeded to judge the schedulability of the hybrid task.It could also schedule aperiodic tasks with hard real-time requirement and give out the schedule result.Keywords:OLE for process Control, Dynamic scheduling algorithms,earliest deadline firstabsolute finish time