Digital colour printing system

The utility model discloses a digital colour printing system, which comprises an electronic graphical pretreatment device, a PDF file producing device, a PDF layout compressing device, a 1-BITTIFF file conversion device or an ICC graphical conversion device, a printer drivers server for storing a 1-BITTIFF file or an ICC graphics, a large-sized printer for printing the 1-BITTIFF file or the ICC graphics, a printing justifying device which is used to print out the approved 1-BITTIFF file or ICC graphics a full page by the printing plate, a printing plate producing device and an offset printing device. The printing plate producing device is a plate maker which makes a printout full page into a plate of the offset printing press. The offset printing device is an offset printer for mounting the made-up plate of the offset printing press and a binding apparatus for binding sheets into a boot. The digital color printing system has the advantages of high speed, economy and easy modification, and is suitable for both large lot and small lot.