A high-quality roller support device is convenient for replacing the roller support device of the roller, which involves a deflectable roller support, support, pin shaft, body, roller, limit block, and fasteners. The lower end of the support is connected to the upper end of the body with fasteners, while the support is connected to the deflection roller bracket with a pin shaft. An idler is installed on the deflection roller bracket. On the deflection roller bracket, there is a clamp groove for rotating around the pin shaft, and the roller is installed in the clamp groove of the deflection roller bracket. On the deflection roller bracket, there is a limit block for controlling the deflection angle. A pin shaft is provided on the support or body for the deflection roller bracket to rotate around it. When the fasteners are removed, the deflection roller bracket can rotate a certain angle around the horizontally fixed pin shaft under the control of the limit block. The groove bracket belongs to a type of roller bracket. Adopting advanced production processes to ensure product quality. The groove type roller can remove belt dirt, and has the best effect with high force and low resistance on sloping belts. Double section roller can reduce the heavy pressure point of the belt on the ceramic roller, and the hollow device of the roller can make the contaminated material fall off on its own without touching the suction roller, both of which can extend the service life of the roller.