Plastic bottle cutting and winding device and winding method

The invention discloses a plastic bottle cutting and winding device and a winding method. The plastic bottle cutting and winding device comprises a base, a bearing cutting mechanism and a bearing clamping mechanism, the bearing cutting mechanism is arranged on the base, an electric wire spool is arranged on the base, a first guide column is vertically and fixedly arranged on the base, and a stand column is vertically and fixedly arranged on the base; the bearing and clamping mechanism is arranged on the stand column and can slide in the height direction of the stand column, the stand column is further provided with a discharging mechanism, the discharging mechanism is used for collecting waste materials at the upper ends of cut plastic bottles in a centralized mode, the feeding distance of a cutting knife can be adjusted by rotating a rotary knob, and therefore the cutting device adapts to cutting of bottle bodies of the plastic bottles of different sizes. A plastic bottle is placed on the bearing disc, the c