Abstract: Promoting utilization of geological data and exerting its effect in city agglomeration economic construction has great significance for social service work of geological data.By analyzing the development status of city agglomeration，this paper describes importance and necessity of geological data in city agglomeration construction，provides exploitation and using form of geological data for city agglomeration，and analyzes the influence and improvement of geological data on city agglomeration construction.Geological data provides basic information for geological work deployment，on the one hand，and decision reference for geological environmental management and resource allocation，on the other.The results show that there are a large amount of basic geological information in geological data，we should take full advantage of geological data to provide available data for city agglomeration from passive to active service with new ideas and ways.