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Precast concrete sandwich insulation external wall panel connected by W-shaped steel bar core glass fiber reinforced polymer

The invention discloses a precast concrete sandwich insulation external wall panel connected by a W-shaped steel bar core glass fiber reinforced polymer, wherein the internal and external wall panels are formed by pouring common concrete or light concrete, a middle insulation layer adopts a non-inflammable or flame-resisting insulation board, and the three structures are connected integrally by a W-shaped steel bar core glass fiber reinforced polymer connecting piece. The connecting piece adopts a middle steel bar core outside which continuous glass fibers are wrapped, and fibers are wound on the surface to form cambered uneven screw threads. The connecting piece is of a W-shaped geometric shape, the space among the turning points of the connecting piece is matched with the space among the pitch points of the reinforcing mesh of the internal and external concrete wall panels, and when installed, the connecting piece penetrates through the middle insulation layer and is placed between the reinforcing meshes of the internal and external wall panels, and then is banded and fixed with the adjacent reinforcing meshes to preform the precast concrete sandwich insulation external wall panel with the W-shaped steel bar core glass fiber reinforced polymer as the connecting piece. By adopting the novel connecting piece, the technical problem of connection reliability of the precast concrete sandwich insulation external wall panel is solved.