Abstract: Described herein is a rotary mop and a rotary structure of a mop handle of the rotary mop. The rotary structure comprises a rotary cylinder of which the inner wall is provided with spiral grooves and a lifting rod penetrating through the rotary cylinder, wherein the lifting rod is provided with a unidirectional rotary one-way bearing, bulges matched with the spiral grooves are apart arranged outside the one-way bearing, when the lifting rod is pressed downwards, the one-way bearing stops rotation, and the bulges and the spiral grooves are mutually matched to drive the rotary cylinder to rotate; and when the lifting rod is pulled upwards, the one-way bearing idly rotates along the spiral grooves. The bottom of the rotary cylinder is provided with a bottom plate for sealing the rotary cylinder, and lubricating oil or lubricating grease is provided in the rotary cylinder.