Provided is a supporting structure for firming an electric power tower. The supporting structure for firming the electric power tower is characterized by comprising a transverse rod, a through hole, a longitudinal rod, a base and an oblique pull rod, wherein the transverse rod is vertically connected with the longitudinal rod in a welded mode, the joint between the transverse rod and the longitudinal rod is provided with the through hole, the base is welded to the bottom of the longitudinal rod, and the oblique pull rod is detachably connected with the end of the transverse rod and the end of the longitudinal rod to form a triangular frame structure. The supporting structure for firming the electric power tower has the advantages of being simple in principle structure, low in manufacturing cost, convenient to use in field operation and wide in application range, and reducing operation difficulty and strength for operators.