The utility model provides a system for change ceramic roller on line, its includes cooling device and roll -changing device, cooling device is suitable for and is used for the cover to establish when changing the pottery passing through the glued position of the inside ceramic roller of sediment case box at needs, cooling device includes that it is in to encircle the setting the cooling main part in the glued position outside and the air supply equipment who provides cooling gas, the cooling main part with the clearance has between the glued position, the cooling be provided with in the main part with the cooling channel of clearance intercommunication, air supply equipment passes through cooling channel to let in cooling gas in the clearance, be used for the cooling main part with form the cooling air film between the glued position, roll -changing device is used for drawing dregs box with ceramic roller. The utility model discloses ceramic roller was not suitable for the ceramic roller of online change during the technical problem that will solve lay in prior art, and then provided one kind to the better system for change ceramic roller on line that is suitable for of ceramic roller cooling effect.