The tri-coloured glazed pottery of the TANG Dynasty produced in Luoyang has been a series of multi-coloured glazed pottery in a unique style.The pottery experienced the historical stages of tri-colooured glazed pottery of the TANG Dynasty, the counterfeited pottery, the handicraft pottery and the pottery evolved from the digestion and changes of the above mentioned categories. As a cultural carrier, the tri-coloured glazed pottery always holds the special position in the development of Henan-Luoyang culture. The accurate understanding of evolution processs of the pottery will help to promote the culture grade of the tri-coloured glazed pottery of the TANG Dynasty.