It is made of metal sheet and has two rows of window holes with inner protruding tongue on the ring wall. Each row of window holes has five tongue lobes, each tongue leaf curved to the ring, pointing to the ring center, the position of the upper and lower window holes staggered each other, the total area of the hole is about 35% of the entire ring wall area. Compared with the same specifications of the raschig ring packing, because of pall ring packing opened many hole in the ring wall, makes the tower of gas and liquid can be free from the window by, so packing layer of gas and liquid distribution than raschig ring packings have greatly improved, its separation performance is prominent, so the pall ring filler is still currently adopted one main ring packing. The products are suitable for various separation, absorption, desorption devices, atmospheric and vacuum devices, synthetic amine decarbonization, desulfurization system, ethylbenzene separation, isooctane, toluene separation and so on.