Abstract: Geological data is limited by the confidential information elements（such as the confidential geographic maps）, which to some extent restrict the provision of geological data services and secondary development processes, and cannot serve the development of the national economy to the greatest extent possible. This paper is mainly based on the research of the confidential technology processing method of geological data, proposing five methods: deletion of confidential information, reduction of accuracy of confidential information, replacement of confidential information, external plugin confidential technology processing, and confidential geological map conversion technology processing. It forms a relatively complete system of confidential technology processing method of geological data, and introduces the workflow of using deletion method for confidential technology processing, improves the level of socialized geological data services and promotes socio-economic development.