Cutting type constant-resistance large-deformation anchor rod

The invention relates to a cutting type constant-resistance large-deformation anchor rod, and belongs to the field of anchoring support. The cutting type constant-resistance large-deformation anchor rod comprises an anchoring section, a free section and a constant-resistance component, wherein the constant-resistance component is formed by combining a threaded rod, a sleeve and an annular cutter, the tail of the threaded rod is provided with threads and is connected with a rod body of the free section through the sleeve, the tail end of the rod body of the free section is an anchor head with an enlarged diameter, a circle of slurry discharging holes are formed in the outer diameter of the anchor head, the anchor rod body is of a hollow structure and can conduct pressurized grouting, and slurry flows out from the slurry discharge holes at the anchor head. The constant-resistance component cuts the threads on the end of the threaded rod through the annular cutter, continuous constant resistance is provided, and