以屋脊的重要建筑构件——当沟为基本材料,简单论述了当沟的用途、产生及演变、当沟在朝鲜半岛及日本列岛的传播方式和途径、制作技术等。汉唐时代中国大陆为当时东亚地区文化繁荣的中心之一,当沟作为当时建筑文明的一部分,伴随着各种礼乐文明向外传播的过程也随之东传,朝鲜半岛及日本列岛发现的众多实物资料正是这一文化交流盛事的见证。 Taking the groove as the basic material, an important building component of roof ridge, this paper briefly discusses the use, generation and evolution of ditches, the ways and means of ditch propagation in the Korean Peninsula and the Japanese islands, and the production techniques. During the Han and Tang Dynasties, mainland China was one of the centers of cultural prosperity in East Asia at that time. When the ditch was part of the architectural civilization at the time, the process of spreading rituals and civilizations along with the rituals and civilizations of East Rim, the Korean Peninsula and the Japanese islands Many kinds of material information is the testimony of this cultural exchange event.