Abstract: The around environment of tunnel deep foundation pit in Beijing is complexity, and the foundation pit is transmeridional, the lenth is 173. 6 meters. North of the foundation pit is Zhichun load, and the south is a series of structure. The distance of the building and the foundation pit is only 2. 06 meters, furthermore the building was used many years. Based on spot checking and detection, the foundation of the building generated obvious asymmetrical settlement in construction of tunnel foundation, therefore, acclivitous split appeared in jamb wall of superstructure. So, it's need to monitor deformation and settlement of the building uninterrupted, analyse and deal with monitor data in time, and submit the result to construction organization. Then, construction organization can adjust construction scheme to proceed informational construction, and ensure safety of the building. The result has instruction function to similar subway project in Beijing area.