Provided is an automatic cleaning device, including: a mobile platform configured to move automatically on an operating surface; and a cleaning module arranged on the mobile platform. The cleaning module includes a dry-cleaning module configured to clean at least a part of the operating surface by means of dry cleaning; and a wet-cleaning module configured to clean at least a part of the operating surface by means of wet cleaning. The wet-cleaning module includes a cleaning head configured to clean the operating surface; and a driving unit configured to drive the cleaning head to substantially reciprocate along a target surface, the target surface being a part of the operating surface. The driving unit includes a driving platform and a supporting platform detachably connected to the driving platform. According to the present disclosure, the pressing structure and the clamping slot structure cooperate to achieve a detachable connection between the supporting platform and the driving platform, thereby facilitating repair and maintenance of the cleaning device.