The utility model discloses a clamping piece type anchor cable sliding groove. Wherein the end cap and the sliding groove section are sequentially connected from front to back. The sliding groove section comprises a first section and at least one standard section. The groove bottom of the front end part of the head section is provided with clamping pieces which are parallel to the groove bottom and are arranged oppositely up and down; the front half portions of the upper clamping piece and the lower clamping piece form a bearing groove, a wall plate at the rear end of the end cap is inserted into the bearing groove and is in butt joint with the end face of the front end of the first section, the sliding groove sections are connected end to end to be long, and the head end of the rear sliding groove section is detachably connected with the tail end of the front sliding groove section through a connecting assembly. The utility model particularly aims at a super-long anchor cable. All thecomponents of the sliding groove are connected in an extension mode which is easy to operate, rapid in extension, convenient to stack and beneficial to cyclic utilization, the designed anchoring length and the required pulling resistance of the ultra-long anchor cable are guaranteed, the construction quality of the anchor cable is guaranteed, and the anchor cable can be recycled, saves energy, isenvironmentally friendly and has good economic benefits.