Detachable autoclaved aerated concrete block

The utility model relates to the technical field of building materials, and particularly discloses a detachable autoclaved aerated concrete building block which comprises a first building block main body, a second building block main body and a connecting rod, and a heat preservation block is arranged between the first building block main body and the second building block main body; positioning concave blocks are arranged on one sides of the first building block main body and the second building block main body; positioning bulges matched with the positioning concave blocks are arranged on one sides, far away from the positioning concave blocks, of the first building block main body and the second building block main body; a through hole for the connecting rod to pass through is formed in the thermal insulation block; a through hole for the connecting rod to pass through is formed in the second building block main body; through the arrangement of the connecting rods and the limiting rods, the first building