External water cooling device of printing machine

The utility model discloses an external water cooling device of a printing machine. The external water cooling device of the printing machine comprises a printing machine frame, a cold water stick and a tap water pipe, wherein the cold water stick is arranged on the printing machine frame; and the tap water pipe is connected with the cold water stick. The external water cooling device of the printing machine further comprises a water storage box and a conversion box, wherein the conversion box is arranged on the cold water stick; the water storage box is provided with a refrigeration region and a water storage region; a refrigeration device is arranged in the refrigeration region and is connected with an input port of the conversion box through an input water pipe; the water storage region is connected with the output end of the conversion box through an output water pipe; and the tap water pipe is connected with the water storage box. The external water cooling device of the printing machine has a simple str