3-D visualization of rock structure is a hotspot in mathematics geology, mechanical exploration, oil exploration, hydroelectric engineering and geological hazard protection and harness. It is also an effective way to reproduce rock structures. The progress in 3-D visualization model in many areas and relative software is introduced. It is presented that 3-D visualization model study in geotechnic engineering far drop behind that in oil geology, studying of 3-D rock structure software used in geotechnic engineering is an urgent task in China.