Geotechnical engineering is ubiquitous in daily life and closely related to people's daily lives. It is the cornerstone of the vigorous development of national large-scale infrastructure. Compared with traditional mechanical testing techniques, the low-field nuclear magnetic resonance technology provided by Nuoyi has demonstrated broad application directions in geotechnical engineering and is irreplaceable by traditional mechanical methods. It has in-depth applications in structural characterization (porosity, pore size distribution), moisture content (moisture content, freeze-thaw mechanism), moisture distribution and dynamic migration (hydration, curing, maintenance, absorption), and online damage (fracture development, heterogeneity, stress damage, triaxial compression), etc. It promotes the rapid and healthy development of the geotechnical engineering field.