The invention discloses a forced feeding device for processing polyester bottle flakes. The forced feeding device comprises a stirring motor, a discharge pipe, a feeding hole, a base support, a driving motor, a driving wheel, a driving belt, a driven wheel, a power source, a fan, a driving shaft, a cutting tool mounting base, a blade and a heater strip, wherein the driving wheel and the driven wheel are arranged in the base support; the driving belt sleeves the driving wheel and the driven wheel; the driving wheel is connected with the driving motor; the power source is arranged on the base support; the discharge pipe and the fan are further arranged on the base support; the fan is connected with the sidewall of the discharge pipe; a stirring motor is arranged at the upper end of the discharge pipe; the driving shaft is arranged in the discharge pipe; the upper end of the driving shaft is connected with the rotating shaft of the stirring motor; a feeding hole is formed on the outer side of the sidewall of the upper end of the discharge pipe; the blade is arranged on the outer side of the driving shaft and fixed on the outer side of the driving shaft by use of the cutting tool mounting base; the heater strip is wound around the blade. According to the forced feeding device for processing polyester bottle flakes, the corresponding heater strip is arranged on the blade and then the blade can be heated and then used for cutting, and therefore, the cutting and the stirring are greatly promoted and the cutting effect is improved.