The utility model provides a machine of waxing sets up at the rear of photoelectricity centering machine, include the traffic direction set gradually along weaving the first water tank of waxing, second wax the water tank, alkali case and actuator wax, wax water tank and wax the top of alkali case and all be equipped with the case lid of first, second, above -mentioned three -box's incasement all is equipped with leads cloth mechanism, and the tail end that first, second was waxed in the water tank all is equipped with wax water recovery unit. The utility model discloses an add the third festival alkali case of waxing for the abundant saponification of wax liquid of not collected, thoroughly emptying utilizes sewage air supporting technology thoroughly to retrieve.