Water washing system of flotation machine and water washing method thereof

The invention discloses a washing system of a flotation machine, and belongs to the technical field of flotation machines, and the washing system of the flotation machine is characterized by comprising a flotation machine body, the flotation machine body comprises a stirring mechanism and a washing mechanism, the driving mechanism is used for driving the stirring mechanism; the flotation cavity is formed in the bottom of the flotation machine body; the feeding opening is used for conveying ore pulp into the flotation cavity; the tailing port is used for discharging the floated tailings; the concentrate port is used for discharging concentrate; the material receiving device corresponds to the concentrate opening and is used for receiving concentrate; the washing device is used for washing the concentrate in the material receiving device; wherein the stirring shaft is provided with an air guide pipe which is movably connected with the stirring shaft, the stirring shaft is provided with a vent hole which is conn