There have been selected 83 samples of terracotta warriors and horses of Emperor QinShi Huang’s Mausoleum,20 samples of clays taken from around Qin’s Mausoleum and 2 samplesof Yaozhou porcelain bodies.All these samples have been measured by instrument neutron acti-vation analysis(INAA)and as many as 32 kinds of element contents of each sample are measured.The following conclusion has been reached when fuzzy cluster analysis is conducted to elementcontents of all these samples:(i)The samples are roughly classified into five categories:namely,samples from pits No.1 and No.2;samples from pit No.3;loam layers;the mixture of loam andloess;and Yaozhou porcelain bodies.(ii)The terracotta warriors and horses in pits No.1,No.2and No.3 are relatively independent from one another.The clays from which they were made arenot entirely identical.We have found that samples in pit No.3 are very closely related and theirclay sources are comparatively concentrated.Samples in pits No.1 and No.2 are less related andtheir clay sources are comparatively scattered.(iii)The clays from which the terracotta warriorsand horses were made are closely related to the loam layer near Qin’s Mausoleum,particularly tothe loam layer of Zaoyuan village and Gaoxing village,but they are not so related to loess layersthere,nor to the loam layers of Anhoubao,even less related to Yaozhou porcelain bodies.A ra-tional deduction thus drawn is that the raw material of clays from which the terracotta warriors andhorses were made might probably be taken from loam layers around Zaoyuan and Gaoxing,orloam layers near Qin’s Mausoleum whose properties are identical with those of loam layers ofZaoyuan and Gaoxing,rather than loess layers around the above places.Since the raw material ofthe terracotta warriors and horses was taken from loam near Qin’s Mausoleum,it could be de-ducted that the kiln sites might be located in around Qin’s Mausoleum. There are been selected 83 samples of terracotta warriors and horses of Emperor Qin Shi Huang’s Mausoleum, 20 samples of clays taken from around Qin’s Mausoleum and 2 samples of Yaozhou porcelain bodies. All these samples have been measured by instrument neutron acti-vation analysis (INAA) and as many as 32 kinds of element contents of each sample are the following conclusion has been reached when fuzzy cluster analysis is conducted to elementcontents of all these samples: (i) The samples areMap classified include five categories: namely, samples from pits No.1 and No.2; samples from pit No. 3; loam layers; the mixture of loam and loess; and Yaozhou porcelain bodies. (Ii) The terracotta warriors and horses in pits No. 1, No. 2 and No. 3 are relatively independent from one another. clays from which they were made arenot entirely identical. We have found that samples in pit No. 3 are very closely related and their clay sources are comparatively concentrated. Samples in pits No. 1 and No. 2 are less re (iii) The clays from which the terracotta warriors and horses were made are closely related to the loam layer near Qin’s Mausoleum, particularly tothe loam layer of Zaoyuan village and Gaoxing village, but they are not so related to loess layersthere, nor to the loam layers of Anhoubao, even less related to Yaozhou porcelain bodies. A ra-tional deduction thus drawn is that the raw material of clays from which the terracotta warriors andhorses were made might probably be taken from loam layers around Zaoyuan and Gaoxing, orloam layers near Qin’s Mausoleum whose properties are identical with those of loam layers of Zaoyuan and Gaoxing, rather than loess layers around the above places. Theince the raw material of the terracotta warriors and horses was taken from loam near Qin’s Mausoleum, it could be de-ducted that the kiln sites might be located in Qin’s Mausoleum.