Abstract: A method of the optimization of the blasting parameters designs in the pillarless sublevel caving production was resumed in this paper. The suitable parameters of the production blasting elaborately introduced in this paper was optimized according to the analysis of actual blasting problems of the fan-shape blasting in the pillarless sublevel caving production and the affection of the structural parameters. Then the layout of blasting bores was drawn as reference. All these results would be an meaningful example of the relevant actual designs.