Roller support assembly, designed for easy replacement of roller supports, includes a pivotable roller support, base, pin shaft, housing, roller, stopper, and fasteners. The base's lower end is connected to the housing's upper end with fasteners, while the base is connected to the pivotable roller support via a pin shaft. Rollers are mounted on the pivotable roller support. On the pivotable roller support, there are grooves for the pin shaft to rotate, with the rollers installed in these grooves. A stopper is set up to control the pivot angle. A pin shaft for the pivotable roller support's rotation is provided on the base or housing. With the fasteners removed, the pivotable roller support can rotate a certain angle around the horizontally fixed pin shaft under the control of the stopper. Slot-type supports are a type of roller support. Advanced production technology ensures product quality.