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With the development of technology and the need for the protection of subsurface culture remains,it is important to identify the size,shape,depth,and location of subsurface targets and related stratigraphy.Fortunately,Ground Penetrating Radar (GPR) has been a steady increase in the use of GPR solving subsurface problems in the field of archaeology without destructively intervening with the buried materials,and it has become one of the most high resolution geophysical mapping methods.The wall is the main symbol of traditional society and the ancient civilization of city in China.And there are numerous buried ancient walls,which should be found,mapped and protected.GPR is an efficient method mapping the buried ancient wall.We applied GPR to describe the buried ancient walls of Nan-zhao ancient city-site in Yunnan Province and Bei-ting ancient city-site in Xinjiang,China,respectively in the field archaeological survey before.In this paper,we select two study regions to show the application results,the area of which selected in the survey of Nan-zhao ancient city-site is 15m×11m,but the area selected in the survey of Bei-ting ancient city-site is 9×15m.Although both the areas are small,the high density of data sampling ensures the accuracy of results.In particular,GPR attribute analysis is applied in the data interpretation,which could describe the buried ancient wall more clearly and intuitively.