Caijiayu Township is a rural township located in Yi County, Baoding, Hebei, China. According to the 2010 census, Caijiayu Township had a population of 2,564, including 1,377 males and 1,187 females. The population was distributed as follows: 358 people aged under 14, 1,881 people aged between 15 and 64, and 325 people aged over 65.