Abstract: D geometry compression is the technique which aims at the compression of model data in 3D scenery. It is important for distributed virtual reality,co operation, and multi player video games, as well as for storing and transfering data in computer. A 3D geometry compression method is introduced in this paper. Existing methods are classified into two kinds according to their usage for single resolution model and multi resolution model. The recent achievements of 3D compression are discussed and the existing problems are analysed.