This paper builds a physical generalized model of submerge ship chamber ship lift with scale of 1:20 to study the impact of chamber tank area and ship chamber’s velocity to hydrodynamic characteristics of the submerge ship chamber ship lift.The results show that the increase of β (ratio of the difference between the area of chamber and chamber tank to the area of chamber)can lower the water surface fluctuation in chamber tank ,the maximum gradient of water surface in approach channel and chamber tank,make mooring conditions of ship chamber better.Considering the project cost increases with β,the recommended β is 1.24.