Abstract: The index quantification and the determination of the weight of sub-units in mine safety evaluation was preliminarily studied.Fuzzy theory and probability value determination method for quantifying the basic indexes，the primary and secondary index queuing，expert consultation and link-relative method for determining the weight of sub-units and the fuzzy theory were used in the safety evaluation of the blasting system of Anhui Dachang Iron Mine.It was concluded that the blasting system was of safety rating.

Key words: Fuzzy theory, Blasting system, Index quantification, Expert consultation method