In view of the current state of inadequate data calculation function of mine design software at home and abroad,according to the low efficiency and complex practical problems facing design of slope structural parameters during mine design,a spatial geometry model of the slope was constructed by analyzing the geometric relationship between the structural parameters of the open field slope and the logic relationship between the parameters of the slope,and the calculation models of the step width and the auxiliary platform width were derived.By regulating the limit requirements for each parameter based on protocol specifications,C# language and .NET platform are used to develop a slope platform calculation program that enables automatic compliance and automatic calculation of slope parameters and provides a simple and efficient operational tool for mine design.