The invention relates to the technical field of plastic bottle cutting equipment and discloses a cutting and winding device for a plastic bottle. The cutting and winding device comprises a feeding cylinder and an annular cutting tool. The feeding cylinder is provided with a feeding end and a discharging end. A feeding rod is arranged in the feeding cylinder and is connected with an air cylinder. The annular cutting tool is rotationally connected to the discharging end and is provided with a blade. A motor is arranged below the annular cutting tool, and a belt is connected between the motor and the annular cutting tool. The feeding end and the discharging end of the feeding cylinder are in a conical shape, and the end, away from the center of the feeding cylinder, of each of the feeding end and the discharging end is the small end. A bottle clamp is hinged to the feeding rod and comprises an upper clamping nozzle and a lower clamping nozzle. A torsion spring is arranged between the upper clamping nozzle and the lower clamping nozzle. Each of the upper clamping nozzle and the lower clamping nozzle is provided with a clamping end and an opening and closing end. A circular ring is connected to the annular cutting tool and is provided with a winding groove, a ball is arranged in the winding groove, and the winding groove is provided with a guide rod. A tension spring is arranged between the guide rod and the ball, and through grooves are formed in the winding groove. By means of the cutting and winding device for the plastic bottle, the problem that the plastic bottle is likely to be wound around the cutting tool after being cut can be solved.