Abstract: The experimental and simulating processes of switching centrifugal pump in the double centrifugal pump water supply system were studied. The experiment results verified the validity of the model. Based on the sensitivity analysis of the experimental process with the model, we can get the following conclusions: In the process of switching centrifugal pump in the double centrifugal pump water supply system, the smaller the system flow and the greater the centrifugal moment of inertia, the greater the loss water, the smaller the minimum flow rate, the longer the system recovery stability; the smaller the characteristic time of the check valves, the more stable the flow volatility of the main circuit, but the volatility of the system flow during switching is very limited.