In foundation design, stratum information is usually obtained by soil exploration and then transferred into 1D or 2D drawings so that the soil distribution conditions can be analyzed. 3D stratum visualization technology can display the stratum distribution in a more vivid and comprehensive way. This article studies the 3D stratum visualization process and its realization methods and applies this technology to foundation design, which is very helpful for foundation layout and foundation elevation system check and reduces the complexity of soil foundation design.