Printing facility and environmentally-friendly printing method

The invention relates to a printing facility, and belongs to the technical field of printing. According to the technical scheme, the printing facility is characterized by comprising a workbench, sliding plates, clamping plates and a driving mechanism. The workbench is arranged at the input end of a conveying device and used for bearing paperboards. The sliding plates are connected to the bearing surface of the workbench in a sliding movement mode in the direction of being perpendicular to the paperboard conveying direction and are symmetrical. The clamping plates are detachably installed on the sliding plates and used for neatening two sides of each paperboard which is stacked on the workbench. The driving mechanism is arranged on the workbench and used for driving the symmetrical clampingplates to get close to each other or keep away from each other. Neatening mechanisms which are used for neatening the other two sides of each paperboard are further arranged on the two sides of eachclamping plate. When a pri