Multi-stage ore crushing device with silt separation function

The invention discloses a multi-stage ore crushing device with a silt separation function, and belongs to the technical field of ore crushing, the multi-stage ore crushing device comprises a fine crushing device, one side of the fine crushing device is communicated with a coarse crushing device, the coarse crushing device comprises a machine body, the top of the machine body is provided with a feeding port, the machine body is internally provided with a crushing cavity, and the crushing cavity is internally provided with a discharging port; a crushing device is arranged in the crushing cavity and comprises a crushing body, a discharging groove is formed between the crushing body and the inner wall of the crushing cavity, and a discharging opening is formed in the side, away from the crushing cavity, of the discharging groove; ores enter the machine body through the feeding port, then fall into the crushing cavity and then fall into the space between the crushing body and the inner wall of the crushing cavity,