The utility model discloses a discharging pore plate of a granulating machine with the gradient-type pore diameter. The discharging pore plate comprises a plate body arranged at a discharging opening of the granulating machine, wherein discharging pores are uniformly formed in the plate body. The discharging pore plate is characterized in that the pore diameter of the discharging pore close to a discharging end is larger than the pore diameter of the discharging pore close to a feeding end. The discharging pore plate disclosed by the utility model has the advantages that the discharging pores in the plate body are formed into the shape that the pore diameter of the discharging end is larger than the pore diameter of the feeding end, so that the contact area between a material and the pore wall is effectively reduced, acting force between material particles and the discharging pore plate is reduced, the benefit for forming the particles is achieved, the blocking is not easy to be caused by the particles, the deformation of the discharging pore plate due to overlarge acting force of the materials is avoided, and the service life of the discharging pore plate is prolonged; the discharging pore plate is simple in structure and obvious in beneficial effects and is suitable for application and promotion.