The three-dimension reconstruction and three-dimension visualization of stratum model are very important for obtaining geological information and geological explanation.In this paper,the three-dimension reconstruction of stratum model is researched.A method of constructing stratum model based on the TIN is put forward which can effectively realize three dimensional reconstructing of the stratum model.This method is simple to realize the construction of stratum model,has quick speed of modeling and wide rang of application,can realizes the three dimensional visualization of stratum model based on the OpenGL three dimensional graph storehouse.