Pre-fabricated aerated concrete composite thermal insulation exterior wall panels, composed of a base ALC (autoclaved aerated concrete) board, combined with a composite thermal insulation board and 35mm thick Class A thermal insulation mortar, forming a lightweight composite thermal insulation exterior wall panel, commonly referred to as the composite thermal insulation exterior wall panel. The composite thermal insulation exterior wall panels are divided into two types based on their construction: Type 1 and Type 11 composite thermal insulation exterior wall panels. The pre-fabricated aerated concrete composite thermal insulation exterior wall panel system consists of the composite thermal insulation exterior wall panels installed on the main structure, the thermal insulation mortar leveling layer, the finishing layer, the decorative layer, as well as the thermal bridge treatment measures for beams, columns, and other components, collectively forming the exterior wall cladding system, commonly referred to as the composite thermal insulation exterior wall panel system. It belongs to the integrated thermal insulation and structural product for prefabricated buildings.