The invention discloses a fodder granulating, drying and discharging device. The device comprises a supporting mounting plate; the upper end of the supporting mounting plate is upwards concentricallyprovided with a conical feeding housing; a lifting cylinder is arranged at the middle position of the conical feeding housing in a vertically-penetrating manner; the upper end of the lifting cylinderis coaxially provided with a variable-diameter pressurizing lifting cylinder; a driving motor is vertically embedded in the middle position of the supporting mounting plate; the upper end of the driving motor is provided with a driving rotating shaft in a manner of vertically upwards penetrating through the lifting cylinder and the variable-diameter pressurizing lifting cylinder; the driving rotating shaft is coaxially provided with a spiral lifting and pressurizing plate in a manner of cooperating with the lifting cylinder and the variable-diameter pressurizing lifting cylinder; the middle position of the upper end of the variable-diameter pressurizing lifting cylinder is vertically upwards provided with a pressurizing, lifting and discharging cylinder in a communication manner; and the upper end of the pressurizing, lifting and discharging cylinder is coaxially provided with a variable-diameter discharging housing. The fodder granulating, drying and discharging device disclosed by the invention has the advantages of being novel in structural design, stable and efficient in transmission, rapid and stable in granulation, continuous in drying and discharging, high in efficiency andgood in quality.