Abstract: With the increasing capacity of new energy engine assembly in the country, thermal power generators have long participated in deep peak shaking (load rate 30%~50%B-MCR), resulting in the problem of rising energy consumption of the steam pump group. In response to the urgent need for energy saving and consumption reduction of auxiliary units, the critical speed of the steam pump, flow unstable zone and energy consumption and other boundary conditions are comprehensively considered. Based on the traditional hysteresis function control, a dynamic coupling model of speed-flow-minimum flow regulating valve opening is introduced to optimize the hysteresis control logic of the minimum flow regulating valve of the steam pump group, and while improving the stability of the flow regulation of the steam pump group, the operation power of the steam pump group is reduced in the peak condition of the steam pump group, achieving the purpose of energy saving and consumption reduction of the steam pump group in depth.