Abstract: The mining boundary integral decision at the west Lanshan Mine is taken as an engineering example to introduce the procedures and methods for providing qualitative and quantitative indices for the five subordinate mining boundary decision objectives by establishing the deposit geological model, rock and earth work model, mining process model and economic appraisal model.Priority is given to the implementation of multi-objective decision based on the utility theory and utility function so as to select the optimized open mine mining boundary programme characterized by safety production,stable side slope,operational mining technology,maximized recovery of mineral resources and best economic benefits.