Abstract: The three-dimensional visualization technology is widely used for its vivid regeneration of the real ground configuration from the investigated ground information and its proper description of the spatial relationships of structural elements.In this paper a 3D geo-body visualization method with the basic body elements of triangular prisms is introduced.The model is constructed with virtual drilling information through the self-decomposition of triangles and sufficiently considering the geological structures like faults in the geological body.The internal information of the geological body is displayed through the technique of self-decomposition.Finally,real drilling data is input to verify the model and the result indicates it is feasible.