Abstract:The development and current situation of through-the-earth communication at home and abroad are reviewed, the research and performance of several different transmission modes are introduced. By comparing the advantages and disadvantages of the representative through-the-earth communication products, PED system, Canary system, intra-safety wireless rock communication system for mining and acoustic through-the-earth communication system, the progress of the through-the-earth communication system in practical application is described. A simplified transmission channel model is established based on its principle. The channel model is established by three-dimensional geological modeling technology and interpolation technology, and the propagation characteristics of electromagnetic field in the formation are studied by numerical calculation method. Finally, combined with the current research and application hotspots, this paper expounds the main problems and the corresponding key technology research of electromagnetic wave through-the-earth communication and magnetic induction through-the-earth communication respectively, and puts forward the future research emphasis and development trend.