This technology involves the field of environmental protection is an internal irrigation gray bag for vacuum cleaning device to draw. Including the vacuum source, the main trachea, trachea branch, high pressure hose, cleaning guns; vacuum source connected to the main air intake pipe, connected to the main pipe branch pipe, one end of the high-pressure hose connected to the suction side branch pipe, high pressure flexible connect the other end vacuum tube gun. The present invention is based on the principle of vacuum suction, irrigation can quickly clean up the ash fouling inside the bag and took the board without causing any harm to the corresponding bag, bag cage wearing parts, so that the user's operating costs baghouse greatly reduced.