The comprehensive dataset of the geological environment in the coastal zone of China obtained as a result of geological survey, is designed according to the overall concept of land-sea coordination to achieve full coverage of relevant disciplines, techniques and methods. The data fall into four categories, namely, comprehensive field surveys, comprehensive field construction, field dynamic monitoring and sample testing. There are total 130 data tables and 177 592 pieces of data, including 9 types of data table and 9 006 pieces of data in the comprehensive field survey category, 68 types of data table and 89 551 pieces of data in the comprehensive field construction category, 28 data table types and 12 305 pieces of data in the field dynamic monitoring category, and 25 data table types and 66 730 pieces of data in the sample testing category. This dataset provides efficient and accurate data services for the unified management of coastal natural resources, spatial planning of territory, use control, ecological protection and restoration.