The invention discloses a magnetic table of a rotary screen printing machine. The magnetic table comprises a tank, a roller, a magnetic table top and a magnetic table base. A plurality of iron core holes are formed in the magnetic table top. An iron core is inserted in each iron core hole in the tank. Each iron core is sleeved with a frame, a coil is wound on each frame, a permanent magnet is arranged on the bottom face of the tank, the two ends of the tank are connected to a support through positioning screws, and the support is fixed to the bottom face. The tank is sleeved with the roller through bearings, the wall of the roller is located between the permanent magnet and a magnetic bar, and the outer wall of the roller makes contact with a printing guide belt. The permanent magnet is fixed to the bottom face of the magnet base with the position capable of being adjusted in the circumferential direction. The magnet base is sleeved with the roller through the bearings, so that on the premise that the permanent magnet and the magnetic bar attract each other, rolling friction is achieved through the roller and the printing guide belt, the friction coefficient between the roller and the printing guide belt is reduced, abrasion is reduced, production efficiency is improved, and energy consumption is reduced.