The suspension bridge scheme is adopted for Chongqing Egongyan bridge. East anchorage is considered as one of anchors for tunnel anchorage，which is assigned in silty-sandstone and sand-mudstone layers. The deformation states of anchorage and wall rock have great influences on the stability and safety of the bridge directly. In order to understand the ultimate bearing capacity of wall rock and the deformation state of the anchorage and rock at tensile force，comprehensive studies are performed on the anchorage and wall rock，such as tests for the parameters of rock mass，tensile test for tunnel anchorage model with scale 1∶12.5，numerical analysis，and grey GM(1，1) model forecast，etc.. The studies show that the deformation of anchorage and wall rock is smaller，which is in the linear stage. The ultimate bearing capacity of wall rock is 6.09～6.15 times of its design load，which is forecasted by grey GM(1，1) model. The results can provide reliable basis for engineering design.