The ball mill end cover is a core structural and sealing connection part of the ball mill main unit cylinder, and an exclusive matched component for mineral processing ball mills. It is divided into two core types: the feed end cover and the discharge end cover, which are fixed at both ends of the ball mill cylinder respectively. As a key component that connects the cylinder with the hollow shaft, enables ore feeding and slurry discharge, and ensures the sealing of the grinding environment inside the mill, it forms the grinding cavity of the ball mill main unit together with the hollow shaft, spherical bearing bush and liner. It directly bears material impact and slurry corrosion during the grinding process, and is adapted to the 24-hour continuous wet grinding working conditions in mines. Its structural strength, sealing performance and connection precision directly determine the grinding efficiency of the ball mill, the smoothness of discharge and the sealing performance of the entire unit's operation. It is an indispensable basic structural component for the main unit of mineral processing ball mills.