Novel composite foamed concrete block

The utility model relates to the field of brick structures, and particularly discloses a novel composite foamed concrete building block which comprises a building block body, the building block body is of a cubic structure, a groove is formed in the upper side of the building block body, and two bosses are arranged at the bottom of the building block body in the length direction of the building block body. The width of the gap between the two bosses is twice of the wall thickness of the building block, when three adjacent building block bodies in the vertical direction and the horizontal direction are stacked, the two bosses of the building block body located on the upper portion are inserted into the grooves of the two building block bodies located on the lower portion respectively, and meanwhile the side walls of the two building block bodies located on the lower portion are clamped; the width side of the boss is attached to the width side of the groove. The building block body adopts a traditional staggere