Three-dimensional geological modeling is the basis of exploration and exploitation of oil, gas, and solid mineral resources. It has vital significance for engineering decision-making and scientific management. A cross-platform geological modeling and visualization software with independent intellectual property rights is developed, based on the Qt framework. The 2.5D geological model is built with the Human-computer interaction (HCI) method, and converted to 3D model which displayed real time based on OpenGL. Software testing results show that the software can run on Windows, Linux platforms and meeting the basis requirement of cross-platform HCI modeling of the mineral exploration.