The invention discloses a mop which comprises a holding rod, a bracket connected to the lower end of the holding rod, and two rows of wiping rollers, wherein the two rows of wiping rollers are arranged on the bracket in parallel back and forth and can unidirectionally rotate; non-return directions of the wiping rollers in front and back rows are opposite; when the mop pushes forwards, the roller in the front row rolls forwards to wet the ground, and the roller in the back row stops for wiping the ground; and when the mop is pulled backwards, the roller in the back row backwards rolls to wet the ground, and the roller in the front row stops to wipe the ground. In the mopping process, the surfaces of the wiping rollers can be fully utilized; even if the rollers are dirt, falling dirt in the rolling process can be collected by the roller in a stopping state and is limited between two rows of rollers, so that the phenomena that the dirt and stain are distributed along the movement of the mop can be reduced or avoided, and the times of cleaning the mop in the mopping process can be reduced. The mop further comprises a wringer arranged in a separating manner. The wringer is of a tong-shaped structure with a simple structure; when the wringer is operated, the damage of the wringer to the rollers is little; when the wringer is damaged or lost, the wringer is only needed to be independently replaced; and the wringer can be also used for clamping solid waste on the ground.