1∶50 000 geologic map of the Huangzhuang map-sheet (J50E004015), Tianjin was mapped by employing the Digital Geological Survey System (DGSS), and consequently a database was built by fully collecting and making use of existing geological data, as well as following industrial specifications. The database includes four datasets, i.e. a basic element, comprehensive element, object element and independent element, in total 23 different categories of data types, accumulating to a data size of 43.8 MB. Among them, there are 96 geological entities, 320 geological (boundaries) lines and 85 videos (photos), as well as nine samples of isotope dating, 10 boreholes and 13 sedimentary (volcanic) lithostratigraphic units. In the geologic map, the genetic type of the superficial deposit landform and its vertical geological structure, stratigraphic structure feature and lithofacies palaeogeographic evolution since the Late Pliocene, as well as the bedrock geological structure, and environmental engineering geological problems were all summarized; the methodology for the geological survey and innovative map presentation of the geologic map in the low coastal plain coverage area was explored simultaneously, which all play an exemplary role for regional geological survey in the coverage area. The database can provide detailed and basic geological data for geological environmental protection, natural resource management, in addition to hydrological, engineering and environmental geological surveying, thus supporting a sustainable development of an important national economic zone, major engineering construction, geological and ecological environmental protection, and urban planning.