Aeration pipe with uniform aeration for biological aerated filter

The utility model discloses an aeration pipe with uniform aeration for a biological aerated filter. The device comprises an outer pipe and a connecting pipe, a main connecting end cover is mounted atthe left end of the outer pipe; a matching groove is formed in the inner side of the main connecting end cover; a sealing ring is mounted on the front surface of the matching groove; a connector is arranged on the inner side of the matching groove; an airtight ring is mounted on the front surface of the connector; a connected end cover is mounted at the right end of the outer pipe; a matching ringis arranged on the inner side of the connected end cover; a connecting ring is arranged on the inner side of the matching ring, a ventilation opening is formed in the inner side of the connecting ring, a supporting plate is fixed to the inner side of the outer pipe, an inner pipe is connected to the middle of the supporting plate, ventilation holes are formed in the outer surface of the inner pipe, an aeration ball is con