In the study of the history of the Tang Dynasty since the 21st century, the collation and study of newly unearthed epitaphs has become a very important academic focus. Along with a large number of works and research papers on epitaphs, there is also a debate on the authenticity of epitaphs. For example, the remarkable Japanese courtier Bei Shudan's Epitaph of Li Xun, the chief official of the Tang Honglu Temple, caused academic waves with the participation of both Chinese and Japanese scholars. In addition, the authenticity of some Tang epitaphs also attracted the attention of scholars, and discussed their content and calligraphy. The main reason is that, for a period of time, with the expansion of the city, the acceleration of urban infrastructure, various production activities and illegal excavation, a large number of epitaphs buried deep in the ground have come to light again. The epitaphs of the Tang Dynasty have exquisite patterns and superb calligraphy. The epitaphs of celebrities and those written by famous scholars, calligraphers or calligraphers have become the targets of folk collections, and the phenomenon of forging epitaphs for profit has also arisen. The early epitaphs were mainly copied and falsified on the epitaphs and inscriptions before the Northern Wei Dynasty, especially the Northern Wei epitaphs. However, the early inscriptions and epitaphs of the Tang Dynasty, which had a large number of surviving epitaphs and more abundant content, gradually became a disaster area for counterfeiters because of their high requirements for the literary and historical skills, calligraphy literacy and carving skills of the counterfeiters and the high cost of counterfeiting. In recent years, this trend has become increasingly fierce, and even some epitaphs of lower level officials and ordinary people with simple content have also appeared to be reprinted and falsified. Some fake epitaphs were collected by state-owned and private museums, and rubbings appeared in epitaphs, even used as new historical materials. With this feeling, Wang Su pointed out in the Preface to the Newly Unearthed Sui and Tang Epitaph in Gaoyang, Chang'an, that "the source of the stolen medieval epitaph is not clear, the authenticity is not clear, the time and place of the excavation are not clear, and whether it is really a puzzling problem to collate and study from the real stone or from the rubbings printed on the fake stone is only unknown". Therefore, it is necessary to distinguish the genuineness and falsity of Tang Zhi in various publications. Based on my own long-term experience in collecting and sorting out Tang Dynasty epitaphs, the author analyzes and explains the relevant issues, hoping to promote the more scientific sorting and use of Tang Dynasty epitaphs. There are several types of falsification of Tang epitaphs. From the perspective of the problematic Tang epitaphs found in the current publications, there are mainly the following types: engraved epitaphs. As most counterfeiters do not have professional knowledge, in order to avoid being exposed, most of the fake epitaphs are the original stone of Tang epitaphs, which is also the most common type of fake Tang epitaphs. For example, the epitaph of Deng Shibing's wife Chen, the epitaph of Wang Nu, and the epitaph of Wang Gongliang. In addition, the Epitaph of Zhang Xizhi's Wife Ashner, the Epitaph of Xiao Ling, and the Epitaph of Lu Gongliang published in recent years are all reprinted. As the original stone is used for engraving, although some of the high-quality engravings are lifelike, most of the engravings are relatively rough, the characters are distorted, and there are authentic references, which are easy to identify. However, there are still some new situations to be vigilant about the inscription of Tang Dynasty epitaphs: for example, some epitaphs that have not been paid attention to in the past have also been engraved. The owners of these epitaphs are mostly lower level officials or women, small in size, simple in content, and poor in calligraphy, which are easy to be confused by the inscription. In addition, there are counterfeiters