High precision additive measuring screw machine

The utility model relates to a high precision additive measuring screw machine which comprises a screw machine, blade bodies and stirring rods, wherein the blade bodies are arranged on a screw shaft at a material feeding opening of the screw machine, and the stirring rods are arranged on the screw shaft close to a material discharging opening of the screw machine; the swing diameter DN2 of the blade bodies is two times larger than the diameter DN1 of the screw blades; and the swing diameter DN3 of the stirring rods is greater than the diameter DN1 of the screw blades and smaller than the inner diameter of a screw tube. The screw machine provided by the utility model has the advantages that by using the blade bodies at the material feeding opening and the stirring rods at the material discharging opening of the screw machine, material feeding and discharging of the screw machine are uniform, and impact to a measuring balance is decreased, so as to enable the measuring accuracy of the additive to be greatly imp