In order to determine characteristics of deformation of the deep excavations in Xi'an subway station, the measured data of the deformation of the deep excavations of 18 subway stations were collected. According to the measured data, the characteristics of lateral displacement of the retaining structure and ground surface settlement caused by deep excavations are statistically studied, and the research results are compared with the deep excavations in other areas. The research shows that:The shape of the lateral displacement curve of the deep excavations' retaining structure is"bulging shape", and the maximum lateral displacement point depth is above the excavation surface; the maximum lateral displacement value ranges from 0.03%H to 0.12%H (H is excavation depth), and decreases with the increase of insertion ratio; the ground surface settlement curve is"groove shape", and the maximum surface settlement position appears at 0.51H; the maximum surface settlement is about 0.06%H, and increase of insertion ratio has no significant effect on the surface settlement; the maximum surface settlement increases with the increase of maximum lateral displacement, and its ratio is approximately equal to 1.10. The research results can provide reference for the deformation prediction, design and construction of similar deep excavations in Xi'an.