Material-saving type soil nail anchor with strong anchoring squeezing and expanding structure

The utility model discloses a material-saving type strong anchoring squeezing and expanding structure soil nail anchor which comprises a control assembly, a squeezing and expanding head assembly and a rod root, the squeezing and expanding head assembly is arranged between the bottom end of the control assembly and the top end of the rod root, the bottom end of a positioner is fixedly connected with a rotating control piece, and a transmission piece is movably connected to the bottom end of the rotating control piece. The movable ring is slidably connected to the outer surface of the limiting sliding rod, the top end of the movable ring is connected to the bottom end of the hollow pressing pipe, when the double-one-way hydraulic oil cylinder extends, the three-branch squeezing and expanding bow pressing arm is bent, the hydraulic sensor arranged in the protective layer transmits pressure data for squeezing a soil body out, the friction force between the soil body and an anchor rod piece is conveniently and acc