The invention relates to a converter turbid circulating water treatment method utilizing a superconductive high-gradient magnetic field, belonging to the fields of environmental protection and treatment of industrial waste water difficult to treat. The method is characterized in that under a superconductive high-gradient magnetic field, converter turbid circulating water is treated by using an inclined board settling basin and a high-gradient treater; the strong magnetization and strong adsorption effects of the superconductive high-gradient magnetic field can be used for adsorbing strongly magnetic ferric oxide substances in waste water and also can be used for adsorbing weakly magnetic substances and even nonmagnetic substances, such as calcium oxide, silicon dioxide, magnesium oxide, and the like; the suspended particle density of the treated waste water is reduced to 5mg/L from 1,216mg/L, the turbidity is reduced to 22.25 NTU from 2873.5 NTU, and the two indexes both reach the national emission standard; meanwhile, the superconductive high-gradient magnetic field can be used for adsorbing small particulate substances with the particle diameters below 100nm; and the average particle diameter of particles in the waste water is reduced to 1.272 mu m from 6.431 mu m. The invention has the advantages of low running cost, easy realization of automatic control, energy saving and consumption reduction.