The magnetic rod is made of high-quality stainless steel tube and rare-earth permanent magnetic material neodymium iron boron / or ferrite. Its shape is mainly round, square and rectangular. The surface magnetic field intensity can reach between 3000-13000 GS. The ferromagnetic impurities in the slurry directly contact the surface of the magnetic rod, making full use of the effective magnetic energy of the magnetic rod, and the structure of the magnetic rod is simple and easy to use. When the material containing iron passes through, it is attracted by the magnetic rod and firmly adsorbs the material containing iron on the tube wall of the magnetic rod to ensure the integrity of the equipment and the safety of the product. The iron removal application of the magnetic rod is that the magnetic rod directly contacts with the slurry to achieve the iron removal.