As the important component of the thermodynamic system, the selection of the main feed water pump will not only affect the safety and efficiency of the whole plant, but also have great effect on both the initial investment of the construction project and the long-term production. The configuration of the main feed water pumps for different ultra supercritical power plants in China are introduced in the paper. The optimization of the selection of main feed water pumps for the ultra supercritical power plants adopted in the phase Ⅱ project of Shazhou Electric Power Co., Ltd. is also carried out.