Torch Festival, called "Xinghui Festival" in the earliest Chinese classics, is the transliteration of xil (firewood) huix (fire) jia in Bai language. There are three names in modern Bai language, one is xinlhuixjia, the other is fvnguavd (similar to: Fuwangwu, which means June Crazy), and the third is zulholyind (making flower boats). Torch Festival has a wide influence among the southwestern ethnic groups. Its origin is an important part of the study of the history of the southwestern ethnic groups, but it is rarely studied. The mainstream academic community in China pays little attention to it. Local scholars lack sufficient research power to invest in it, and coupled with the cultural genocide policy of Mu Ying in Dali during the Ming Dynasty, the difficulty of research is also very great. The origin widely circulated among the people is the story of "burning Songming Tower". According to legend, in the Tang Dynasty, Piloge, the leader of Mengshe Zhao, one of the six Zhaos in Dali, attempted to annex the other five swamps. On June 24, Piloge lured the leaders of each Zhao to Songming Tower to drink and set them on fire to burn them to death. Mrs. Bai Jie, the wife of the Lord of Dengzhen Zhao, had long seen through Piroge's ambition and advised her husband not to go, but she had to go because of the ancestral worship and the power of Nanzhao. Mrs. Bai Jie knew that this trip would be dangerous, so she put an iron bracelet on her husband's hand, and later recognized her husband's body. Seeing that Mrs. Bai Jie was beautiful and intelligent, the King of Nanzhao forced her to be a concubine. Mrs. Bai Jie pretended to agree, but after returning to bury her husband, she led the people to fight bloody battles with the Nanzhao soldiers who besieged the city. After running out of ammunition and food, she jumped into the sea and died on June 25th. On June 25th every year, people of all ethnic groups in urban and rural areas of Dali, Jianchuan, Eryuan and other Bai ethnic groups inhabited areas wear festive costumes, slaughter pigs and sheep, and celebrate the festival. Children were busy splitting torches, girls were busy crushing gold dug from the mountains, wrapping them on their hands and dyeing them red nails, and adults stood a 20-meter-high wooden pole on the ground in the center of the village square, and tied wheat straw, dry bamboo and other things around it to form a big torch, on which were inserted colorful liters, which indicated a good harvest, and pears strung with colorful threads were hung all over the torches. At night, after people lit the big torches, the children each held a small torch and ran and shouted in the fields, and from time to time they sprinkled handfuls of rosin on the flames, causing bursts of flames. In villages near the sea, there were also rowing competitions. People used this to commemorate Mrs. Baijie, who was upright and unyielding. In fact, combined with the historical characteristics of the ethnic groups where the Torch Festival customs are popular, some meaningful insights can be obtained. The Torch Festival is popular in the northern ethnic group of Yunnan, that is, the Diqiang group, including the Bai, Yi, Naxi, Pumi and other ethnic groups. According to general knowledge, the Diqiang ethnic group came from the cold and dry Qinghai-Tibet Plateau. Fire is of greater significance to the survival of these ethnic groups. Fire piles and torches have been very important elements in the ethnic life of the past thousands of years. It is almost natural that high-level value judgments and spiritual beliefs on fire have emerged. On the other hand, for ethnic groups in southern Yunnan, such as the Dai people, who live in the tropics, the importance of water is self-evident, so the Dai people have a water splashing festival. The impact of the geo-geographical environment on social life has led to the development of related cultural characteristics. This should be the starting point for serious thinking about the origin of the Torch Festival. A sub-discussion of the origin of the Torch Festival is the "uniqueness of the origin of the Torch Festival". After the Torch Festival was simply classified as a festival of the Yi people, a stupid inference is that the Bai Torch Festival originated from the Yi Torch Festival. The flaw in this inference is that the Torch Festival within the Yi people is highly inconsistent. There is inconsistency in time and geographical distribution. The Yi people in the Wumeng area do not even have the custom of the Torch Festival. Therefore, this inference cannot explain the highly consistent characteristics of the Bai Torch Festival in terms of time, content and form within the ethnic group. In view of the 500-year-long influence of the Nanzhao Dali Kingdom established by the Bai people on Yunnan, the inference that "the Yi Torch Festival originated from the Bai people" is more logically reasonable. Taking a step back, considering the huge differences in the name, related legends, time, and celebration form of the Yi Torch Festival, except for the Yi Torch Festival in Dali Prefecture, which originated from the Bai people, the Yi Torch Festival in other places is likely to have an independent origin. The universality of the ritualized expression of fire culture among the Diqiang ethnic group from the north can completely produce more than one independent origin.