In order to study the hydraulic characteristics of bifurcated pipes in pumped storage power station when different units are pumped at the same time, combined with the shape and design parameters of bifurcated pipes in a pumped storage power station, the hydraulic characteristics of bifurcated pipes in the same unit with the same pumping and discharge were numerically simulated by using the hydrodynamic model. The results show that, within the scope of the study, the return flow and low pressure zone will occur in the bifurcated section of the same pumping operation, and the maximum head loss coefficient is 0. 5. Meanwhile, the flow pattern in the bifurcated pipe will deteriorate and the head loss will increase when the same hydraulic unit operates with the same pumping flow, but it is feasible from the hydraulic point of view.