The invention discloses a valve port filling machine with a quantitative function for furnace lining material production, and belongs to the technical field of valve port filling machines. The valve port filling machine comprises a filling box body. A mounting groove is formed above the outer wall of the right side of the filling box body. An annular moving groove is formed in the inner wall of the left side of the mounting groove. When furnace lining materials entering a storage tank need to be quantified, a handle can be rotated to drive a rotary table and a screw rod to rotate, the screw rod rotates to drive a moving block to move left and right under the limiting action of a limiting rod, the moving block moves left and right so as to drive a connecting rod and a rack to move left andright, the rack moves left and right to drive an outer gear ring and a rotary connecting block to rotate, and the rotary connecting block rotates so that the relative contact area of discharging holesand quantitative discharging holes can be changed. The relative contact area of the discharging holes and the quantitative discharging holes is changed, and therefore the furnace lining materials entering a discharging pipe through the discharging holes and the quantitative discharging holes are changed, and the purpose of quantitative discharging control is achieved.