The utility model discloses a be applied to export block in MBBR technology blocks to cuboid structure and vertical placing. Aeration equipment is equipped with to the block below. It is equipped with the electric brush head to block the netlist face. The high -usage that back flush, operation management are simple, pack is packed, is convenient for to wash, need not to difficult the jam, improves the mobility of the carrier of l attached -growth biomembrane at reactor.