Ground anchor

The utility model relates to the technical field of geotechnical engineering anchoring, and discloses a ground anchor which structurally comprises a ground anchor rod and a rock layer, a cavity is formed in the middle of the ground anchor rod, a lead screw is arranged in the cavity, fixing strips are movably installed on the two sides of the ground anchor rod, a drilling groove is formed in the upper end of the rock layer, and a fixing block is movably installed in the cavity. Through the arrangement of the ground anchor rod, the lead screw, the sawteeth, the gear, the sliding block, the inserting rod and the through hole, when the ground anchor is installed, the rack can drive the sawteeth on the fixing strip to abut against the inner wall of the drilling groove, so that the ground anchor rod is limited, and the lead screw can be matched with the lead screw sleeve to drive the fixing block to move downwards; when the ground anchor rod is installed, the inserting rod on the fixing block punctures the rubber g