Building block profile for building

The utility model belongs to the technical field of building materials, and particularly relates to a building block profile for a building. The building block comprises a building block body, the building block body is rectangular, the front end and the rear end of the building block body are respectively provided with a dovetail joint structure, and the dovetail joint at the front end of the building block body and the dovetail joint at the rear end of the building block body are connected in a convex-concave embedded mode. The building block body is provided with a thermal insulation material layer, and the thermal insulation material layer is arranged on the inner side of the building block body. According to the building block, the building block body is not made of a metal material, but is tied by a PET high polymer material, the PET packing belt is not connected by a metal packing buckle, but is welded in a hot melting manner, and a PET perforation part is arranged in the building block body and is not