A layer of halo-like layered corrosion products has been observed covering green-yellow glazed pottery fragments excavated from the Caocun kiln, Linzhang, Hebei. In order to determine the cause of this corrosion layer and provide a reference for future archaeological restorations, the products were analyzed by optical microscopy (OM), energy dispersive X-ray fluorescence (EDXRF), X-ray diffraction (XRF), Raman spectroscopy (Raman) and Fourier transform infrared spectroscopy (FTIR). The results showed that the corrosion products could be divided into three layers, the upper was brown, the middle was golden yellow and the lower was silvery white. The white layer was mainly white lead and quartz. The storage environment of Caocun kiln was very wet, which led ions in the glaze and the soluble salts of carbonate from soil to precipitate on the surface. There was space between the sediment and glazed layer so that the water can dissolve. The process repeated itself and so the number of layers increased. When it reached a certain thickness, it presented a silver-white luster due to the interference effects of the light. When the iron oxide content was high, it would be golden yellow or brown. At present, it is suggested that the term silver glaze should be removed as part of the historical record. Moisture and pollution should be avoided during storage.