Outer wall building block

The utility model discloses an outer wall building block, include the ceramsite concrete layer and set up in the netted strengthening rib of the intraformational reinforcing bar of ceramsite concrete, the netted strengthening rib of reinforcing bar is including the horizontal first reinforcing bar that sets up and vertical second reinforcing bar that sets up, first reinforcing bar and second reinforcing bar cross section welded connection, the said ceramsite concrete layer left and right sides is provided with relative public tenon and female tenon, and what ceramsite concrete in situ portion was provided with two above longitudinal extensions subtracts matter drainage through-hole, and the surface on ceramsite concrete layer is pasted and is equipped with another surface of air entrainment brick and pastes and be equipped with the decorative layer. The utility model discloses outer wall building block not only quality is light, still has good sound insulation and anti-seismic performance, need not the internal surface moreover and whitewashes the construction.