Sliding supporting device for printing structure of printing machine

The invention discloses a sliding supporting device for a printing structure of a printing machine. The sliding supporting device comprises a main mechanism, the main mechanism comprises a bottom plate, two supporting plates are fixedly connected to the two sides of the upper surface of the bottom plate, the same cross beam is fixedly connected between the two supporting plates, a printing mechanism is arranged on the surface of the top end of the cross beam, a rolling mechanism is arranged at the lower end of the cross beam, power mechanisms are arranged on the two sides of the lower surfaceof the cross beam, and external flatting mechanisms are arranged at the two ends of the rolling mechanism. The sliding supporting device for the printing structure of the printing machine has the beneficial effects that stable sliding is achieved by arranging a sliding groove and a limiting groove, the rolling mechanism is arranged to be of a torsional spring pressing structure to lift first rollers, and primary leading-i