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.

The offset printing machine can be divided into monochrome, two-color, four-color and multi-color printing presses according to the number of printing colors completed by one paper feeding. It can be divided into small offset printing presses, six open, four open, half open and full sheet paper printing presses according to the maximum paper size of the printer. In addition, there is a double-sided printing press that can complete two side printing at the same time by one paper feeding. According to the fountain system, it can be divided into alcohol machine (i.e., alcohol fountain offset press, water wheel (i.e., water fountain offset press) and water free offset press.