The utility model discloses a blending device is led surely to non -woven fabrics, the on -line screen storage device comprises a base, the top welding of base has the bottom plate, the upper surfaceof bottom plate has the electro -magnet layer through the bolt fastening, the side welding of bottom plate has the cell support, the top spiro union of cell support has the battery, and the battery passes through the wire and be connected with the electro -magnet layer, the top on electro -magnet layer is equipped with movable baffle, and movable baffle's top is equipped with the fixed plate, thefixed plate is fixed on the inner wall on device shell top, and the bottom of fixed plate opens and to have the slide, movable baffle's top is rotated and is connected with the pulley, and pulley sliding connection is in the slide, movable baffle's middle part welding has the spring, movable baffle's bottom joint has the magnetic head, the bottom intermediate position welding of fixed plate has the mount, it has a hole to open on the mount, and the downthehole bearing that has cup jointed, the transfer line has been cup jointed in the bearing. The utility model discloses simple structure, it is convenient to adjust, adjusts the precision height.