Abstract: As one of the key functions of the PQF pipe mill, the tube-end sharpening process is based on the technical supports by the PQF's HCCS, the PSS, the QAS as well as the excellent motor speed control technology of ABB. Thanks to the accurate control of the position of the roll servo screw-down cylinder and the motor rpm, the tube-end sharpening process is ensured to be actually applied to the PQF mill, which considerably reduces the length of the upset tube end, such reduce the crop length to get the yield enhanced.