Ball mill capable of grinding materials in grading mode

The invention relates to the technical field of ball mills, in particular to a ball mill capable of grinding materials in a grading mode, which comprises a ball mill frame, a grinding material barrel is installed on the ball mill frame, a fixed feeding pipe is fixedly arranged on the upper side of one end of the grinding material barrel, and protruding side plates are symmetrically and fixedly arranged on the two sides of the fixed feeding pipe. A bearing matching rod is fixedly arranged on the protruding side plate, a supporting table plate is fixedly arranged in the grinding material barrel, the annular partition plate can be positioned and supported through the supporting table plate, a plurality of hollow sleeve rods are arranged in the grinding material barrel, and the grinding material barrel is fixedly installed through cooperation of the hollow sleeve rods and locking insertion holes; the multi-point fixing guarantees firm installation, meanwhile, the threaded driving rod can synchronously drive the m