Abstract: To investigate the transient working characteristics of the pump, the opening valve law and the pressure change in the pipeline in the filling process of the pumping station, the rigid column model and elastic column model of the hydraulic transient of the filling process are established based on the wave tracking method and the interface tracking method. The calculated and experimental results of the filling process of a pumping station show that the hydraulic transient of the filling process in the short pipe calculated by the two models is consistent with the experimental results. In the process of valve opening, the flow rate of the pump increases sharply, the head decreases rapidly and the power increases. After reaching the extreme value, with the completion of the filling process, the pump parameters are stable at the working point. The pressure head after the valve is the result of a combined effect of primary and reflected waves.