Dadongdi was founded in the second year of Hongwu in Ming Dynasty (1369). The polder field is located in the valley of the mountain pit, and the locals call it a "hole", so it is called a big hole. In the forty-four years of Kangxi in Qing Dynasty (1705), it was established as a symbol of the past. In the 16th year of Daoguang reign (1836), Liu Chen Township was established in the Republic of China. 1949 10 Liu Chen Township is divided into Dadong Township and Shuibian Township. 1September, 958, there were six people's communes in the county. Dadong, Shuibian, Lianjiang and Li Xi belong to Yuejin People's Commune. 1April 1959, the county was divided into 14 people's communes, named after local names, and the waterside people's commune was established; In June of the same year 165438+ 10, Dadong People's Commune was established. 1983 withdrew from Dadong district, in April 1987 withdrew from Dadong township, and 10/993 changed to town system.