From in-depth study of the quarry safety evaluation and analysis from security management and production system to build a quarry safety evaluation system. To establish Extension comprehensive evaluation model based on matter element theory, extension set theory and the associated function. Using AHP to determine the right and calculated evaluation object associated degrees to assess the level of security. By a combination of qualitative and quantitative evaluation ，this?method can avoid the subjectivity, and it can be more accurate evaluation of the level of safety of the quarry and its orientation. A case study shows that the method of evaluation results are consistent with the actual situation is better, the calculation is simple and with good practice.