Abstract: Experimental research on the fluidized characteristics of four magnetic particles with different average diameters (from 213 μm to 512 μm) was carried out in this study.The effects of such factors as intensity of the magnetic field and diameter of the particles, on the stable zone in the magnetically fluidized bed were investigated and discussed.Based on the experiments,by using the dimensionless analysis method, an experimental correlation to calculate the stable zone with three dimensionless numbers, i.e. the ratio of magnetic potential to gravity potential Er, Archimedes number Ar and Reynolds number Re, was proposed.In addition, the level of significance of the correlation was tested, and the results showed that the most significant factor to influence the stable fluidization zone was Er, and Ar was the second, while Re was the least significant factor.