Abstract: In order to improve the casting blast effect and to optimize the casting blast parameters, the seven evaluation indexes of explosive single consumption, effective throwing rate, coefficient of volumetric expansion, casting distance, maximum vibration speed, loose square volume and blasting output per meter hole are selected to establish an integrated evaluation system of Grey relational-AHP and Entropy weight method-AHP.The evaluation of the casting blast effect of 10 explosion fragmentation section in an open pit mine, the horizontal evaluation of the single evaluation method, the integrated evaluation method and the integrated evaluation method, combined with the subjective and objective factors for quantitative analysis, thereby obtaining a more accurate and comprehensive evaluation of the blasting effect.