The invention relates to a cantilever supporting type roller supporting frame for packing paper. The cantilever supporting type roller supporting frame for packing paper comprises supporting brackets distributed on the left side and the right side. A roller post is erected between the supporting brackets. The front side face and the rear side face of the roller post are each provided with a slide rail arranged in the length direction of the roller post. Each slide rail is provided with a sliding block in a sliding fit mode. The front side face and the rear side face of the left portion of the roller post are each fixedly provided with a motor. A shaft of each motor is connected with a screw rod through a coupler. The screw rods are parallel to the roller post. According to the cantilever supporting type roller supporting frame for packing paper, a first roller and a second roller are both adjusted through the roller post in a unified mode, so that compared with the mode that two supporting devices are used for supporting separately in the prior art, the supporting frame is advantageous in that the usage numbers of devices is reduced and the device floor space is reduced. In addition, the two rollers are flexible to adjust and can be subjected to not only rotating adjustment around the roller post but also left-right moving adjustment along the corresponding screws, and the adjustment convenience level of the rollers in the paper feeding process is greatly improved. The roller post is fixed reliably, so that device using safety is guaranteed.