Abstract: The 1∶50 000 mineral geological map database of the Bazang Map-sheet (I48E013009), Gansu was compiled under the guidance of the Guide for Compiling Maps of Mineral Geological Survey Results (draft for discussion) and the three-in-one ore prospecting prediction geological model. The collected data include the previous 1∶50 000 regional geological survey primitive data maps, mineral investigation reports, scientific research reports, academic papers, and gathered data in the 1∶50 000 specific mapping. Data records include 811 entries on attitude, 102 on geological boundary, 5 on isotopic age, 2 on fossil, 21 on mineral information, 22 on mineralization alteration, 86 on fault, 111 on fold, and 65 on formation. The map face is a combination of the master map and corner maps to give a full, objective presentation of the regional geological boundaries, rock formations, eras, faults, fold axial traces, joints, cleavages, wrinkle lineations, mullion structures, fault plane striations, mineralization alterations, mineral information, and the metallogenic geology of typical deposits, covering the Caledonian storm deposits and fold deformations, Early Carboniferous ferruginous nodules, and a series of new discoveries and new understandings. In the attributes of the “formation-structure” layer, ore-bearing formations and mineralization alterations are emphasized. In the “fault” layer and “fold” structure layer, ore-forming structures are emphasized. The database provides basic data for the investigation and research of regional metallogenesis as well as engineering geology and environmental geology, and can be retrieved by users whenever so needed. The data volume of the Bazang Map-sheet is approximately 90.2 MB for the MapGIS spatial database and 2.51 MB for the Access database.