Abstract: Parametric design is to make the parameters such as size and location reflected through expression, by controlling the expression of size and location to affect the design of the whole model, which is a kind of top-down design method. In this paper, using the development plan of flat, WAVE module and PTS module based on UG were used to establish parametric design model and human-computer interaction interface of WK-75 mining excavators indexing platform. The establishment of the human-computer interaction interface and indexing platform parametric design model effectively saves design time and reduces the workload design of the excavator indexing platform, to improve the design efficiency of the enterprise, which has great practical significance.