Abstract：Based on numerical simulation results of tunnel anchorage system for suspension bridge，and through validating by similar model field test，the mechanical behavior characteristics，deformation mechanism and stabilization state of rock mass of anchorage system have been researched. The results show that，in main cable tension and operation stage of anchorage，the rock mass clip-holdup effect is to withstand part of the anchorage from rotating up and sliding forward，with the bottom front as fulcrum. Initial prestress，length of free-segment of anchor cable and the load value determine contribution value and action occasion of the anchor cable and tunnel anchorage. Inclination，length，magnification angle of anchorage，interface roughness concentration and bonding capacity，etc. affect the displacement of anchorage and stability of rock mass.
