Building brick for drainage

The utility model discloses a building brick for drainage, include the brick body, brick body upper surface is provided with big lug and small convex block, and small convex block highly is greater than big lug, and big lug is the cylinder, is equipped with the through -hole to the side of the big lug, big lug inside is equipped with vertical tubule, and this tubule one end is linked together withthe through -hole, and the other end is linked together with drainage pipe, and the wash port of drainage pipe bottom the brick body is linked together, drainage pipe is the slope form, brick body bottom still is equipped with the round subbottom, is provided with shock absorption rubber mat between the brick body and the subbottom, and the subbottom inboard is equipped with filters mesh grid, and brick body one side is equipped with to be connected protrudingly, and brick body opposite side is equipped with connecting grooves, connecting the arch and suiting with the connecting grooves size,small convex block is the