Assembled aerated concrete composite thermal insulation external wall panels, a type of lightweight composite thermal insulation external wall panel composed of a base of autoclaved aerated concrete (ALC) boards, composite thermal insulation boards, and 35mm thick Class A thermal insulation mortar. Abbreviated as composite thermal insulation external wall panels. These panels are divided into two types based on their construction: Type 1 and Type 11 composite thermal insulation external wall panels. The assembled aerated concrete composite thermal insulation external wall panel system consists of the composite thermal insulation external wall panels installed on the main structure, thermal insulation mortar leveling layer, finishing layer, decorative layer, and thermal bridge treatment measures for beams, columns, etc., forming the external wall protective system. Abbreviated as the composite thermal insulation external wall panel system. It belongs to the integrated thermal insulation and structural products for assembled buildings.