Chimney inner wall cleaning device

The invention discloses a chimney inner wall cleaning device, which belongs to the technical field of cleaning equipment, and is technically characterized by comprising a cleaning unit rotationally connected to a cleaning machine; the rotating unit is mounted in the cleaning machine and connected with the cleaning unit; one end of the linkage unit is connected to the cleaning unit, and the other end of the linkage unit is connected to the rotating unit. When the inner wall of the chimney is cleaned, the cleaning machine is placed into the chimney, the rotating unit is started, the rotating unit can drive the cleaning unit to rotate on the cleaning machine, the cleaning unit slides outwards and makes contact with the inner wall of the chimney, and therefore the inner wall of the chimney can be cleaned. When rotating, the rotating unit can drive the cleaning unit to slide up and down in the cleaning machine in a reciprocating manner through connection with the linkage unit, so that the cleaning unit can slide u