Protective device for assisting ore crushing

The protection device comprises a vertically-arranged crushing box body, an ore crushing space is formed in the crushing box body, the upper end of the crushing box body is open, a horizontally-arranged crushing mechanism is arranged on the inner wall of the crushing box body, and the joint of the crushing mechanism and the crushing box body is located on the lower middle portion of the crushing box body. A dust falling mechanism is connected to one side of the outer wall of the crushing box body and communicates with one side of the crushing box body through a conveying pipe, the joint of the conveying pipe and the crushing box body is located above the crushing mechanism, a discharging through hole is formed in the bottom of the crushing box body, and supporting legs are connected to the bottoms of the crushing box body and the dust falling mechanism correspondingly; the problem that in the existing ore crushing process, ore particles splash all around is solved, and the problem that a large amount of dust