Ball milling tank, ball milling equipment and application of ball milling tank

The invention relates to the technical field of powder processing, and discloses a ball-milling tank, ball-milling equipment and application of the ball-milling tank and the ball-milling equipment. The invention discloses a ball milling tank which comprises channels of three structure types A, B and C, a feeding hole and a discharging hole are respectively formed in two ends of the channel A, the channel B or the channel C; the channel A is arranged in the center of the device; the channel B is arranged around the channel A in the center of the ball milling tank; the channel C is connected with the inner wall of the ball milling tank; the channel A is alternately provided with a high polishing area with higher vertical height and a low polishing area with lower vertical height along the axial direction; the channel B is alternately provided with a low polishing area with lower vertical height and a high polishing area with higher vertical height along the axial direction; the channel C is alternately provided