Abstract: During the establishment of the Spatial Database System for Mineral Reserves of Liaoning Province, the platform of MapEngine is adopted to create the reserves database covering the overall province. The software of Micromine is applied in the establishment of the reserves database of middle and large mines. Bases on MapGIS, the interface is developed to directly call the three-dimensional model of ore bodies generated by Micromine. Through this database system, the management of mineral reserves in Liaoning Province realizes a leap from mining area to reserves calculation, from surface to deep, from two-dimension to three-dimension, and from macro to micro.