Abstract：Aiming at the defects and hidden troubles in reinforcement of layered slope by prestressed bolts，the mechanical mechanism is deduced theoretically and test is conducted and analyzed contrastively；and a conclusion that the change of designed inclination of anchors will bring a contrary influence on shear strength and withdrawal resistance of anchors is drawn，which makes design difficult. Therefore，a viewpoint that multiplex reinforced method of pressure grouting and anchors could solve the problems is brought forward. A bolted and grouted jointed model is established and analyzed；and a conclusion that pressure grouting will strengthen the shear strength and stiffness of bolted layered slope is drawn，it provides theoretical references for the multiplex reinforced method. Finally，the method is applied and validated by an actual engineering；and some key technological problems about the method are illuminated.
