The new low-temperature heat rod can effectively reduce the temperature of underground permafrost and increase the cold storage capacity of permafrost layer by utilizing the unidirectional thermal conductivity of heat pipe, so that the permafrost layer will not be melted and loosened in summer, and ensure the stability of the roadbed. In the Qinghai-Tibet Railway permafrost roadbed reinforcement project application has achieved remarkable results, solved the Qinghai-Tibet Railway roadbed many years of permafrost summer thawing and sinking, winter freezing and expansion of the instability of the problem. It can be widely used to solve the problem of thawing and deformation of railroad roadbed, highway, bridge culvert, tunnel, airplane runway, oil pipeline, power transmission tower and other infrastructures on permafrost and rocky soil.