Building block

The utility model relates to a building block, rectangular through -hole A is seted up along its length direction is vertical in block body middle part, through -hole B is seted up to the last vertical symmetry of block body, rectangular through -hole A is located between the two through -hole B, the vertical arc recess of seting up on the wall of block body left side, the vertical arc arch that sets up on the wall of block body right side, the vertical through -hole B that sets up of the bellied circular department of arc, fill thermal -insulation layer A in the through -hole B, fill thermal -insulation layer B in the through -hole B, set up arc heat preservation C in the arc recess, arc heat preservation C cooperatees with adjacent arc arch. The utility model discloses beneficial effect: block body weight is lighter, is convenient for build by laying bricks or stones, has improved the efficiency of construction, and fine solution owing to the reason in gap between the building block leads to producing the p