Abstract: In order to study the effect of the saturation magnetization of magnetic matrices in high gradient magnetic separator on the magnetism gathering performance so as to provide a theoretical basis for selecting the magnetic dielectric materials for high gradient magnetic separator，ANSYS software is used to simulate the magnetic field distribution of 4 kinds of saturation magnetization with different backgrounds around the magnetic matrices. The results show that: Under the lower background magnetic field than 0.8 T，the four kinds of matrices haven't reach their magnetic saturation，and the magnetic field strength，magnetic field gradient and magnetic force generated by the matrices are substantially the same; When the background magnetic field is higher than 1.1 T，the four kinds of matrices reach the magnetic saturation，the magnetic field strength，magnetic field gradient and magnetic force generated by the matrices with high saturation magnetization is greater than that with low saturation magnetization.

Key words: Magnetic matrices, Saturation magnetization, High gradient magnetic separator, Magnetic field intensity, Magnetic field gradient, Magnetic force