Soil has different textures, as well as varying abundance of gravel and even different cracks. Therefore, during the manufacture of soil monoliths, how to repair the cracks, how to achieve the high-quality of pouring resin and solidification, and how to carve to realistically depict the original and natural structure of soil, are matters of great concern. This study focused on 39 soil monoliths collected during the Third National Soil Survey in Tongliao City, Inner Mongolia, and explored the techniques and methods of soil monolith preparation. The “crack original soil restoration method” was used to address the cracks generated in the monoliths; the “no-drilling soil stabilizer film infiltration method” was used for the pouring resin process; and the “peeling off method” was used for the carving process. The monoliths produced by the above methods showed good results. At the same time, proposals were given for the long-term preservation and display of soil monoliths in different regional environments.