Dongxinfang Subdistrict () is a subdistrict located within Mentougou District, Beijing, China. It borders Longquan Town and Chengzi Subdistrict in the north, Dayu Subdistrict in the east, Longquan and Tanzhesi Towns in the south, and Longquan Town in the west. Its population was 36,076.
The subdistrict took its name from Dongxinfang Village that used to exist within the region.
Dongxinfang Subdistrict oversaw 9 communities as of 2021: