The invention discloses a rake type pulverizing hot air stirring sludge drying device. The rake type pulverizing hot air stirring sludge drying device is composed of a speed changing motor, a feedinggroove, a spiral material guiding and feeding shaft, a machine body, grid section wing plate scattering teeth, a stirring shaft, an air outlet, a bearing fixing sleeve, a discharging port, machine legs, a hot air inlet pipe, a speed reducer, a supporting platform and a stirring motor. The hot air inlet pipe is adopted for drying sludge biological organic fertilizer and biological solid fuel entering the machine body, the stirring shaft with the grid section wing plate scattering teeth arranged at equal intervals is used for stirring and pulverizing the sludge biological organic fertilizer andthe biological solid fuel entering the machine body, and the defects that feeding is caked, pulverizing is difficult and the drying effect in blocks is not good are overcome. The beneficial effects that the drying yield is high, the treating capability is high, the material body pulverizing, colliding and scattering effects are good, and the processing cost is low are achieved; and the rake type pulverizing hot air stirring sludge drying device is ideal equipment for sludge biological organic fertilizer and biological solid fuel drying production.