Abstract: Based on surrounding rock stress changes caused by the roadway tunneling and the relationship between support and surrounding rock deformation, the support mechanism of yield bolt (cable) was discussed. A new type of yield-damping equipment, its structural characteristics of deformation characteristics were analyzed by experiment.The results show that the device can not only realize the yield function, but also has damping function under impact loading and avoiding breaking due to excessive stress on the bolt (cable), which is more conducive to the overall stability of surrounding rock.