Abstract: To meet the more and more strict requirement of environmental protection, and with the reducing of unit utilization hours, the profit space of fossil fired power plant has been squeezed continuously, power plant is improving production efficiency by way of operation mode optimization and technological transformation of equipment. Through dynamic programming algorithm, combining computer programming, optimizing the operation mode of the pulverizing system can reduce the working energy consumption, improve power supply efficiency of the unit, the method and thinking of energy saving has extension value.