In order to change the traditional water supply system in terms of energy saving

combined with the typical characteristics of the water supply system

an optimal scheduling model for water pump parallel operation with energy saving is established.The differential evolution（DE） algorithm is used to solve the model.On the premise of ensuring the quality of water supply system service user

optimize the number of pumps and the adjustment rate of the pump station to make the overall energy consumption of the system the lowest.The simulation experiment platform is built using MATLAB

which verifies the validity and practicability of the differential evolution algorithm.