Abstract：Exemplified by data quality control of China's mineral resources potential evaluation special project,this paper put forward the data quality control process for the very complex problem domain,systematically illuminated the essential models,methods and techniques of the data quality control,and briefly described the design idea and implementation of the data quality control software system as well as the related research achievements. Practices have verified the effectiveness,feasibility,practicability and representativeness of the data quality control models,methods and techniques,and the results obtained have certain reference significance and application value. The methods and techniques have a very good demonstration effect and application prospect, are suitable for the work of data quality control of various geological spatial data ptoject.