Abstract:Data quality check is an important and complicated part in geological map spatial database construction project. It should run through each aspects of data input and database construction. Methods and means of the check technique have been under continuous updates. In this paper, setting regional geological map spatial database construction with the scale of 1∶50000 as an example, different methods and means in different stages of the database construction process have bee illustrated. Various methods should be used in data quality check. By using manual check and software check, the quality of inputting datas can be guranteed.