Cleaning device and extraction tank

The cleaning device comprises a driving assembly and a cleaning assembly, the driving assembly comprises a driving part, the mounting end of the driving part is mounted on an extraction tank body, the cleaning assembly comprises a first connecting pipe and a spray head, and a liquid outlet of the first connecting pipe is connected with the spray head. A second connecting part of the first connecting pipe is hinged to the driving end of the driving piece, and a liquid inlet of the first connecting pipe is suitable for being communicated with a water supply system; the driving end of the driving part drives the first connecting pipe to move towards the bottom cover, so that the spray head is driven to move towards the bottom cover until the spray head right faces the bottom cover, then water is supplied to the first connecting pipe through the water supply system, water flow is sprayed out of the spray head through the first connecting pipe, and cleaning of the bottom cover is achieved. Water does not need to b