The utility model relates to an air volume cover convenient to operate. The air volume cover comprises an air volume cover body, a base fixed to the bottom of the air volume cover body and a signal processing device located in the base. A flanging part extending outwards is arranged at the top end of the air volume cover body, the flanging part and the air volume cover body are sewn and fixed, a magnet mechanism is arranged in a closed cavity defined by the flanging part and the air volume cover body, a sealing layer and a zipper are arranged on the flanging part, and a first canvas rope is fixed to the base. According to the utility model, the air volume cover body is carried in front of the body through the first canvas rope; the pressure borne by the hand can be reduced; the air volumecover body is conveniently aligned with the air port; saving alignment time, the air volume cover body is attracted to an air opening of a ceiling through the magnet mechanism, hand holding is not needed, the sealing performance between the air volume cover body and the air opening is improved through the arrangement of the sealing layer, meanwhile, the air volume cover body can be conveniently taken down from the ceiling, the magnet mechanism can be conveniently detached through the arrangement of the zipper, and the air volume cover body can be conveniently stored.