The invention relates to sanitary cleaning appliances, in particular to a mop cleaning and drying drum. The mop cleaning and drying drum comprises a drum body, a water throwing-off frame, a stirring disk and a pedal mechanism, wherein the pedal mechanism is linked with the water throwing-off frame and the stirring disk; and the pedal mechanism comprises a pedal plate, a composite gear, a bevel gear, a rack, a stirring disk gear and a base. The design key points are as follows: the pedal plate is provided with a sector gear which is a two-sided gear; a large bevel gear, a small cylindrical gear and a spindle are connected into a whole to form the composite gear; the inner gear of the sector gear is engaged with the small cylindrical gear, and the outer gear of the sector gear is engaged with the rack; the rack is a combined type rack and is meshed with the stirring disk gear; and the stirring disk is provided with agitating vanes having different sizes and heights, and the improved stirring disk has better cleaning effect. The mop cleaning and drying drum has compact whole structure and convenient maintenance, uses the combined type rack, reduces maintenance cost, and is suitable for improving the structures of the existing similar products.