Abstract: In order to solve the problem of optimization of dumping plan for an open pit mine, the AHP method and the GRAP method are organically combined to establish a comprehensive evaluation model of AHP-GRAP, and the comprehensive evaluation of the alternative soil dumping scheme is preferred.Taking the production stripping ratio, coal mining distance, stripping distance, stripping lifting height, and dumping space of internal dumping site as the evaluation index, the corresponding engineering quantity is calculated by three-dimensional modeling and simulated mining technology to determine the parameter values of each index.The weight of each evaluation index is objectively determined by the analytic hierarchy process, and then the model vector to be tested consisting of the importance of the evaluation indicators in the criterion layer and the preferred feature matrix composed of the relative weights of each factor in the scheme layer are given according to the gray comprehensive evaluation method. Through the correlation calculation, the comprehensive evaluation value of the three schemes based on the evaluation index is determined.The results show that the third northern advancement scheme is optimal.