The hydraulic floating ship lift is a new-type vertical ship lift using water as the ascending power and safety measures,which was put forward with independent intellectual property rights in China,In view of the current research on this type of ship lift,we design a simplified model of single shaft balance weight system to conduct the sine vibration test on different frequencies and amplitudes.Experimental results show that the response from the low-frequency vibration response is obvious than that from the high frequency,and the greater the amplitude,the more intense the vibration response is.When the test frequency approaches the the model’s self-vibration frequency,water between the shaft and buoy water swing severely and the buoy moves up & down obviously,and the ship chamber also moves up and down with it.All the above movements will exert a significant influence on the balanced and safe operation of the ship lift,so an in-depth research is needed.