Relying on the horizontal freezing reinforcement project of shield tunnels in a subway station, the development characteristics of brine temperature and soil temperature in different areas of the frozen zone were analyzed by real-time monitoring of the cup-shaped frozen soil wall temperature field, and the intersection time and development speed of the frozen soil wall in different areas of the frozen area were calculated. The analysis of monitoring results showed that compared with the measurement point with a deeper buried depth in the same temperature measuring hole, the frozen soil intersection time and development rate in the plate plus solid area were longer, and the development rate was slower, while the change of frozen soil intersection time and development speed in the cylinder reinforcement area was not obvious. At the interface between frozen soil and underground continuous wall, the average development rate of frozen soil in the plate reinforcement area was significantly faster than that in the cylindrical reinforcement area, and the intersection time of the frozen soil wall in the cylindrical reinforcement area was 31 d, and the average development rate was 20.9 mm/d, while the average development rate of frozen soil wall in different areas of plate reinforcement area was obvious, the fastest development rate was 60.5 mm/d, and the slowest development rate was 35.3 mm/d.