Abstract: The practical calculative precision of non-loading cable system is studied preliminarily by qualitative and quantitative analysis methods in this paper. The approach level of various replaced methods compared with the catenary is studied by qualitative analysis method based on the equation and hypothetic conditions of the catenary. The error value and statistical value of four main parameters are compared through quantitative analysis. The aim is to find out the applicable scope and precision of the main parameters which could satisfy simultaneously the requirements of the cableway engineering design in various replaced methods. The main parameters are central deflection coefficient (φ₀), maximum tension (T_(0m)), suspended length(L₀) and elastic extension (⊿L₀) of non-loading cable system.