Dahuanqi Township () is a rural township located in Weichang Manchu and Mongol Autonomous County, Chengde, Hebei, China. According to the 2010 census, Dahuanqi Township had a population of 7,131, including 3,594 males and 3,537 females. The population was distributed as follows: 1,546 people aged under 14, 5,041 people aged between 15 and 64, and 544 people aged over 65.