This paper discusses the reasons why jiaozi first appeared in Sichuan from two aspects: domestic situation and regional situation.

1 Domestic situation: Sichuan has a relatively developed agriculture and handicraft industry, and its western Sichuan plain and fertile fields are the first in the country, so it has the reputation of "land of abundance". At the same time, due to the Anshi Rebellion, the separatist regime of the buffer region, the peasant war at the end of the Tang Dynasty and the separatist regime of the Five Dynasties and Ten Countries, a large number of bureaucratic nobles, landlords and wealthy businessmen in the Central Plains gathered in Sichuan, including many royal nobles in the Tang Dynasty, making the social wealth in Sichuan the first in the country. These favorable factors not only create a certain material foundation for Sichuan's economic development, but also objectively promote local commercial trade.

2 From the perspective of physical geography: (1) Sichuan is a basin surrounded by mountains, which is extremely dangerous. As the old saying goes, it is difficult to get through the Shu Road and get to the sky. Objectively, it has hindered the relatively developed economy in central Sichuan from expanding outward. However, Sichuan is rich in material wealth and has a good economic foundation, so its commercial activities will inevitably have economic and trade relations with other places, especially with important cities such as Chang 'an, Luoyang and Yangzhou. However, the steep mountains make it difficult for Sichuan businessmen to carry large items and heavy coins for long-distance travel. (2) Bandits robbed and soldiers of fortune fled. (3) In the history of Sichuan, the amount of iron ore mining is low, the iron smelting industry is weak, and the amount of iron money in circulation society is small. Therefore, replacing iron money with "paper money" is born because of luck.