Assembled aerated concrete composite thermal insulation exterior wall panels, composed of a base of autoclaved aerated concrete panels (ALC panels), combined with composite thermal insulation boards 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 assembled 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, and the thermal bridge treatment measures for beams, columns, etc., 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 products for assembled buildings.