Magnetic powder cooling device of rotary offset machine

The utility model discloses a magnetic powder cooling device of a rotary offset machine. The magnetic powder cooling device of the rotary offset machine comprises a magnetic powder tension control unit. The magnetic powder tension control unit is provided with a return water pipe and a cooling water inlet pipe. The return water pipe extends into a water tank, the inside of the water tank is provided with a water pump, and a water outlet of the water pump is communicated with the magnetic powder tension control unit through a circulating water inlet pipe. By adopting the structure, the magnetic powder cooling device of the rotary offset machine has the following advantages: first, a large amount of water resources can be saved by utilizing cooling water circulation; and second, production cost can be also lowered, and the magnetic powder cooling device of the rotary offset machine is economical, practical and good in effect.