A study on the roost-site selection of Lady Amhersts pheasant was conducted by radio telemetry, systematic searching and tracking at the Liziping Nature Reserve, Shimian, Sichuan，China, from April 2005 to September 2006. At each of the totally 24 roost-sites which we found, a round quadrat with r=7.5m was set. This was subdivided into four 1m×1m quadrats by marking shrubs and four 0.5m×0.5m quadrats by marking grasses. The variables of roost-trees, arbors, shrubs and grasses were recorded, and 24 no-used sites (chosen randomly from 128 samples) and 24 day-habitat-sites (chosen randomly from 258 samples) were sampled as control. We analyzed the data of roost-sites by Principal Component Analysis, and compared differences between the roost-sites and the control samples by Independent Samples t-Test. The results showed that the pheasants preferred to roost in conifer trees, which are located mostly in conifer and conifer-broad-leaf mixed forests. Pairs of Lady Amherst′s pheasants preferred to roost closely in the same tree with the male upper and the female underneath during the breeding period. With the PCA, we found that the roost-site was significantly affected by the topography, roost-tree, concealment and shielding conditions. Compared with no-used sites, the roost-sites had lower, sparser trees and fewer fallen wood environments; Also, compared with habitat-sites, the roost-sites had less-cover shrub-grass environments.