Studying on the anchor mechanism of cable in weathered rock mass more precisely, the stress state of the pressure-type cable was analyzed based on theoretical analysis by studying stress changes with the elastic modulus of weathered rock, the radius of the anchor holes and priestesses load, Which obtained the compressive stress of anchor cable hole grout, the rule of shear stress distribution around the contact surface. The results enriched the anchor mechanism of cable and provided a theoretical basis for practical engineering applications.