This paper describes the deformation body force transfer characteristics of anchored rock body in the national "Eighth Five-Year Plan" key scientific and technological research project "Research on the mechanism of prestressing group anchor reinforcement of high slope". Through on-site group anchor test, indoor model test and numerical calculation verification study, it is found that the group anchor stabilization is different from the rigid body method of anchoring the rock body of the dynamic mechanism of force transfer effect, put forward the new parameter theory of anchoring according to the degree of safety, and explore the mechanism of the "rock shell effect" field of the new compressive stress layer on the surface of the rock body to determine the effect of anchoring.