The invention relates to a full-length clamp connecting member for installing a low carbon plate on a building outer wall. The full-length clamp connecting member is characterized by comprising a pre-embedded connecting piece, an adapting piece, a keel and a full-length clamp; the pre-embedded connecting piece consists of a pre-embedded connecting piece body, an expansion bolt and a fastening bolt; the pre-embedded connecting piece body is an angle steel member with long and short edges; the long edge of the pre-embedded connecting piece body is fixedly connected with the keel through the fastening bolt; the keel is connected with the adapting piece; the single side of the adapting piece is connected with the full-length clamp; and the full-length clamp consists of an upper clamp or a middle clamp or a lower clamp and a fastening bolt. According to a using method, the pre-embedded connecting piece is pre-embedded on the surface of the wall; and the low carbon plates are installed layer by layer from top to bottom. The invention has the advantages that: slots are preformed on the upper and lower edges of the prefabricated low carbon plate, and only the low carbon plate is connected with the connecting piece which is fixed on the building outer wall and used for previously leveling the keel during construction.