Printing machine paper collecting device with protection function

The utility model belongs to the technical field, and particularly relates to a printing machine paper collecting device with a protection function, which comprises a bottom plate, a protection mechanism and a lifting mechanism, a printing machine body is arranged at the upper end of the bottom plate, a material guide plate is arranged on the printing machine body, the protection mechanism is arranged on the bottom plate, a collecting box is arranged on the protection mechanism, and the lifting mechanism is arranged on the bottom plate. A containing plate is connected into the collecting box in a sliding mode, a lifting mechanism is arranged on the collecting box, and a supporting rod is arranged on the protecting mechanism. By designing the shell, the top plate, a square block, a clamping pin, a pulling block and other structures, the upper roller and the lower roller are installed in the shell, and therefore the upper roller and the lower roller can be prevented from injuring personnel; and when the paper n