Waterproof paint rolling brush device

The utility model relates to the field of coating rolling brush devices, and discloses a waterproof coating rolling brush device which comprises a support, the support is arranged in a concave shape, a supporting rod is arranged in the support in a penetrating mode, one end of the supporting rod penetrates through the support and extends outwards to be connected with a rotary knob, the two ends of the outer wall of the supporting rod are each sleeved with an installation ring, and the outer wall of each installation ring is provided with three supporting plates; a connecting rod is arranged between every two opposite supporting plates in a penetrating mode, rolling brushes are arranged on the outer walls of the three connecting rods in a sleeving mode, a sleeve is arranged on the bottom face of the support and connected with a moving rod, a main rod is arranged on the outer wall of the moving rod in a sleeving mode, and the main rod and the moving rod are connected through a fastening assembly. The positions