Paint roller cleaning tool

The paint roller cleaning tool comprises a fixed cylinder, a rotary cylinder and a positioning head, a rotary driving assembly is arranged in the fixed cylinder, the positioning head comprises a plurality of elastic arms arranged around the circumference, movable channels are formed in the elastic arms, movable blocks are arranged in the movable channels, and the bottoms of the elastic arms are bent inwards to limit the movable blocks. A reset spring is arranged between the bottom of the rotating cylinder and the movable block, a plurality of guide cylinders extend from the side wall of the rotating cylinder in the radial direction, counterweight pistons are movably arranged in the guide cylinders, the pistons are connected with the movable block through inhaul cables penetrating through the bottom of the rotating cylinder, and water storage cavities connected with the guide cylinders are formed in the rotating cylinder; the bottom of the water storage cavity is provided with a one-way water inlet connected w