No.3 and No.4 line ship locks at Changzhou adopt the oversize plane valves,with the dimension of 4.6 m×6.0 m, which is far above the level both at home and abroad with outstanding air-defense and anti-vibration performance which used to be a key technical problem of ship lock’s construction.Through the prototype measurement,it verified the effect of vibration resisting and cavitation suppressing measure put forward in the model research,and obtained satisfactory commissioning results which can be referred for the similar projects.