Because of the steep mountain near the exit of some hydropower stations，it is difficult to arrange pressure front ponds on the exit slopes.This paper takes the tunnel front ponds of Qingshanhe hydropower station as an engineering example to simulate and analyze the surge wave based on Saint-Venant equation.To determine the feasibility of setting the tunnel exit hole in the front pool.The simulation analysis shows that during the positive wave propagation of the front pool of the Qingshanhe hydropower station.The water surface line of the tunnel and the front pool does not exceed the constant flow surface line when the design flow overflows from the overflow weir.During the process of negative surge wave propagation，the surface line of tunnel and forebay decreases slightly.The pressure pipeline is submerged in water and deep.It is safe and feasible to set the front pool in the tunnel.