The steel wire rope is a flexible medium for connecting the balance weight and the ship chamber in the mechanical connection system of the hydro-floating ship lift. The deformation characteristics of the steel wire rope during the operation are closely related to the stability of ship lift，and the research significance is clear. According to the deformation of the wire rope，a one-dimensional simulation calculation is carried out to analysis the deformation characteristics of the rope end，then to reveal the additional displacement characteristics of the ship chamber or balance weight caused by the elastic deformation of the wire rope during operation.In addition，a three-dimensional coupling model of “synchronous shaft-steel wire rope-water carrying ship chamber”is established to study the influence of the elastic modulus of the steel wire rope on ship chamber’s longitudinal inclination，and the response law of ship chamber’s longitudinal inclination to the elastic modulus of the wire rope is obtained.