Based on the research thoughts and the basic demands for three-dimensional visualization system of deposit,the basic principle and realization of three-dimensional visualization system of geologic bodies are introduced in this paper.And in view of the irregularity of mineral bodies,on the basis of existing molding techniques,it is illustrated how to use VC 6.0,SQL Server2000,OpenGL's graphic library and conventional geological data as well as solid modeling method to establish three-dimensional deposit model with high authenticity.