The invention provides a concentrated ore pulp discharging device having long service life. The concentrated ore pulp discharging device comprises an upper discharging body and a lower discharging body connected at the lower end of the upper discharging body, the upper discharging body comprises a funnel-shaped shell, a flange disc arranged at the upper end of the shell and an upper connecting disc arranged at the lower end of the shell, section of a lower cavity body of an inner cavity of the shell is kidney-shaped, and at least a circle of annular groove with the center coincident with that of the lower cavity body is formed in the lower end face of the upper connecting disc; the lower discharging body comprises a tube with a kidney-shaped section of an inner cavity and a lower connecting disc arranged at the upper end of the tube and connected with the upper connecting disc through a rotating structure, and the center of the kidney-shaped inner cavity of the tube is coincident with that of the kidney-shaped inner cavity on the lower portion of the shell; annular protrusions corresponding to the annular grooves in position and number and embedded in the same are arranged on the lower connecting disc. The concentrated ore pulp discharging device can be used for underflow discharging of various concentrating devices.