Abstract: Based on the requirement of energy-saving generation dispatch, a new optimizing method that combines dynamic programming algorithm and priority list method is proposed to determine the operation mode of units in this paper, the equal incremental principle is used to allocate load of unit at each time, and the wastage discharge of generator unit is introduced in unit list. The combination of list method and dynamic programming algorithm can deal with dimension problem of dynamic programming algorithm, and avoids losing optimizing solution by priority list method. In addition, by considering power response speed of units, path optimizing resolves time coupling problem through defining path. The example results show the validity and correctness of this method.