Based on 3-D-steady Navier-Stokes equations with the standard k-ε turbulence closure models, the structure mesh with fitted body coordinate and the finite element based finite volume method, the 400 meters head pump-turbine runner inner flow was simulated in the pump mode. The head, efficiency and net positive suction head of the pump-turbine have been calculated through integrating the velocity and pressure of the finite volume in the runner. The velocity, vorticity and the blade pressure distribution rules were all discussed. The meridional velocity near the leading edge of the blade had the “S” shape along the radius, and that near the trailing edge of the blade had the “M” shape along the radius. The vorticity mainly appeared on the blade, crown and band of the runner. 