Paper-cutting in northern Shaanxi is dominated by monochrome paper-cutting, with simple and simple shape, emphasis on exaggeration and deformation, and inheritance of ancient aesthetic taste and modeling concept. In terms of content, animals and flowers are the main ones. It is said that Confucius enlightened the world, but he neglected northern Shaanxi, so the temperament of northern Shaanxi people is not as gentle as that of Guanzhong people, so they are very creative and emotional, so they have a strong personality. In Jingbian, Anbian and Dingbian in northern Shaanxi, people call it "three-sided paper-cutting", and paper-cutting has become another style, which is subtle, small but refined, small but medium and accurate in description. "Lele" is as thin as a needle tip, and the trimming is as thin as a hair. What is the difference between it and Yan 'an Sui? Paper-cutting is rough, but it is different from the ingenuity and realism of Jiangnan. According to research, Trilateral was once an important border town, and the court often sent southern generals to guard it. They live here with their families, and also bring the folk culture of the water town, which is combined with the local folk art in Gu Zhuo to form a unique trilateral paper-cut.