Abstract: With the continuous enrichment of market application scenarios，the types of permanent magnet magnetic separators are also increasingly diversified，and the structural characteristics of each mag‐ netic separator are different. In order to deeply study the differential performance of these diversified perma‐ nent magnet magnetic separators in dealing with material characteristics and adapting to the environment， starting from the core link of magnetic system structure design and assembly process of permanent magnet magnetic separators，combined with magnetic circuit analysis，material selection and separation dynamics theory，the structural design principle and assembly process technology of the magnetic system of the core components of the three mainstream permanent magnet magnetic separators of drum type，roller type and plate type are discussed in depth. Through comparative analysis，it is found that permanent magnet magnetic separators with different magnetic field characteristics have unique advantages in magnetic field strength， separation efficiency and applicable scenarios，in order to provide theoretical basis and technical reference for the optimization and engineering application of mineral separation equipment，and promote the further development of permanent magnet magnetic separation technology.

Key words: permanent magnet magnetic separator, magnetic system, structure design, assembly pro‐ cess