Prefabricated slab rolling and galling device

The utility model relates to a precast slab rolling napping device, including napping roller and elevating mechanism, said napping roller includes roller body and a plurality of napping ring knives that are provided on the outer wall of roller body, the plurality of napping ring knives are evenly distributed at intervals along the axis direction of roller body, elevating mechanism includes bracing frame no. One end of the first supporting frame is hinged to the mounting table, the other end of the first supporting frame is connected with the end of the napping roller, one end of the second supporting frame is hinged to the middle of the first supporting frame, the other end of the second supporting frame is hinged to the linear driving mechanism arranged on the mounting table, and the linear driving mechanism can drive the end of the second supporting frame connected with the linear driving mechanism to move linearly. Therefore, the first supporting frame is driven to rotate, and the napping roller is driven