Inverted-umbrella-shaped surface aerator convenient to disassemble and assemble

The utility model relates to an inverted-umbrella-shaped surface aerator convenient to disassemble and assemble, which comprises a base, a fixing seat is arranged below the base, a plurality of threaded holes distributed in a row are respectively formed in the positions, close to two sides, of the surface of the fixing seat, the whole base is H-shaped steel, and the base comprises an upper wing plate and a lower wing plate. Two pieces of supporting steel are fixed between the upper wing plate and the lower wing plate, a plurality of U-shaped holes corresponding to the threaded holes are formedin the upper wing plate and the lower wing plate of the base respectively, the U-shaped holes transversely penetrate through the side edges of the upper wing plate and the lower wing plate, screw rods penetrating through the U-shaped holes are in threaded connection in the threaded holes, and pressing blocks abutting against the surface of the lower wing plate are fixed to the screw rods. Receding grooves are formed in t