There are 5 sections of artificially filled high subgrade subsiding of 100~600mm in Tahuangqi East Station of Tangshan-Baotou Railway Line， which seriously affects driving safety. In view of such problem， the upper part of the subsidence subgrade was filled with soil， the bottom of the ballast was grouted， the retaining walls were added and stones were layed on the shoulder of the subsidence section at the two edges of the station area. In the construction process， the construction difficulties such as the secondary vertical reverse transport of materials in the high subgrade station area， near horizontal tilt implantation of the grouting pipe at the top of the subgrade in the high subgrade station area， sealing of the ring gap of the grouting pipe wall and the implantation of the grouting pipe on the line rail are solved. The quality standards and engineering objectives of disease control were achieved.