According to different printing conditions and basic printing methods, it can be divided into sheet fed automatic flat offset press and web high-speed rotary offset press; According to different printing color number, it can be divided into monochrome machine, two-color machine, four-color machine, six color machine and eight color machine; According to different printing paper, it can be divided into four starting machines, double starting machines, full sheet machines and double full sheet machines. The difference with other rotary printing presses lies in the different types of printing plates. Rubber rollers and wetting devices are added.

Offset printing machine is a kind of lithographic printing machine. When printing, the printed pictures and texts are printed from the printing plate to the rubber cylinder, and then transferred to the paper by the rubber cylinder.