Superconducting magnetic separator technology exploits the power of intense magnetic fields to discriminate between magnetic and non-magnetic materials, proving indispensable across various sectors including mining, recycling, and water treatment. This study seeks to elucidate the influence of different magnetic gathering media on the magnetic field distribution within superconducting magnetic separators through comprehensive modeling and simulation. Employing Infolytica MagNet software, we simulated the magnetic field distribution in a JS-6-102 pilot-scale superconducting magnetic separator, assessing conditions both without magnetic media and with diverse magnetic matrices, including mesh and rod types. Our simulations reveal that the inclusion of magnetic matrices markedly modifies the magnetic field distribution, leading to enhanced magnetic induction intensity and variations in field uniformity. Specifically, we found that smaller mesh sizes produce a more homogeneous magnetic field, whereas larger rod diameters induce greater magnetic field distortion. These insights are pivotal for optimizing the design and operational efficiency of superconducting magnetic separation systems.