The invention discloses a low-noise fuel gas rapid water heater. The water heater comprises a machine body and damp-proof filtering devices; the damp-proof filtering devices are arranged on the left side and the right side of the machine body, the damp-proof filtering devices are fixedly connected to the left side and the right side of the machine body through welding, and the damp-proof filteringdevices penetrate through the outer surfaces of the left end and the right end of the machine body; an exhaust pipeline is arranged at the center position of the top end of the machine body, and thebottom end of the exhaust pipeline is fixedly connected to the top end of the machine body through welding; the exhaust pipeline is provided with a pipeline inside the machine body, and the exhaust pipeline is connected to the pipeline inside the machine body; a movable air door device is arranged inside the exhaust pipeline, and the movable air door device is fixedly connected to the interior ofthe exhaust pipeline through welding, and air inlet grooves are formed in the left side and the right side of the machine body; and flaky damp-absorbing agents and filtering nets can be connected to the interiors of the air inlet grooves in a sleeve mode through supporting handles under the action of the force, so that the effects of filtering and damp absorption are achieved.