Baijuyi was one of the three great poets in Tang Dynasty. He was respected and admired by later generations because he loved the people and wrote poems for the people. However, for a long time, Bai juyi has been criticized by some people because of his ancestor ’s life experience．The discussion on the mystery of Byju’s ancestors has always been a hot topic in literary research circles, however, the scholars have doubted each other, and have not reached a conclusion. In recent years, new tombstone relics have been unearthed, such as the tablet of chu king Bai sheng written by Bai Juyi, and the epitaph of Bai Bangyan written by Bai Bang han(Bai Bang Yang is the grand son of yuyi's younger brother xing Jian). has provided new clues and evidence for the solution of the mystery of Baijuyi's distant ancestors. A very important method of textual and historical textual research is to "take the physical objects underground and the legacy texts on paper to mutually explain." The newly unearthed epitaph involves many aspects such as Bai Juyi's family background and contacts, and can provide an important basis for resolving some of the previously debated and unconfirmed issues. Based on the results of various researches, the depth and breadth of Bai Juyi's research will be greatly expanded in the 21st century, and the realm of research will be greatly improved, and the future can be expected.