Navigable tunnel is a typical narrow channel with shallow water depth.When a ship sails in such channels，the asymmetric water areas on both sides of the ship，as well as the reflection superposition of the traveling wave and shockwave caused by the filling and emptying system，will cause asymmetrical lateral forces on the hull and increase the difficulty of controlling the hull.In order to solve the wave effect when the ship sails in the tunnel，this paper proposes a wave absorber with columns and transverse plates and adopts a physical model to carry out ship model tests，so as to analyze the energy-absorbing effect of the absorber.It has been verified that the absorber can reduce the wave amplitude effectively.