Abstract: Most inscriptionsof the Tang Dynasty (618—907) retained today are eroded and difficult to read.In the process of sorting inscriptions,the rubbings and annotations of the former generations can be used to distinguish and compare.The four collation methods advocated by Chen Yuan,namely,comparison with different versions,cross-reference of the book，usage of other books or materials,and inference and deduction,are equally effective to sort inscriptions of the Tang Dynasty.These methods are conducive to further restoration of the original appearance of the inscriptions,and are more accurate and effective to reveal the real content and detailed internal forms,systems and so on.The four collocation methods have their advantages and disadvantages,and it is advisable to use them synthetically to restore the original forms of inscriptions of the Tang Dynasty.

Key words: four collation methods, inscriptions of Tang Dynasty, literature sorting