Hydro-floating ship lift is a new type of the navigation structure.The operation of the ship chamber is completely driven by the water of the buoyancy,which has very clear advantages compared with traditional ship lift.In this paper,we design and establish the single-silo generalized physical model,preliminarily discuss the main factors that affect the operation stable of the ship lift,and contrast the hydraulic property and the fluctuation of the balance weight in different working conditions.The results show that when clearance ration is 0.061,increasing flow rate has no influence on the fluctuation of balance rising,and the rising process of balance is relatively stable