From the Han dynasty to the Wei, Jin, Southern and Northern Dynasties, the northern part of Xide belonged to Taitung County,[citation needed] the southern part belonged to Sushi County,[citation needed] and the area around Beishan Township belonged to Qiong Du County.

At the beginning of the Tang Dynasty, the Xide area belonged to Yueqi County, and later changed to Jingzhou.

Dali set up two forest departments between Taiping and Qiang Du, and the county belonged to it.

In the Yuan Dynasty, the Xide area belonged to Luo Luos Xuanwei Division, Jianchang Road, and Qiang Du Prefecture, while the Yi area belonged to the Tusi surnamed Ling.

In the early years of the Republic of China, Xide belonged to three counties of Xichang, Mianning, and Yueqi.

[2] In 1951, the southwest of the former Ningdong Administrative Bureau and the Beishan Model Political Guidance District merged to establish the Hongmao Magu Yi Autonomous Region in Xichang County.

[3] Xide in north central Liangshan was once classified as a national-level poverty-stricken county.

In November 2020, Sichuan's provincial government announced that the seven remaining impoverished counties in the prefecture, including Xide County, had removed their "hats of poverty" after five painstaking years of targeted poverty alleviation work.

[citation needed] The terrain is high in the northeast and low in the southwest, and the mountains and rivers are mostly north–south.

The highest point is located in the main peak of Erze Russia in Xiaoxiangling, with an altitude of 4500.4 meters, and the lowest point is located in Hong Shinzui, Lizi Township, with an altitude of 1580 meters.

National first- and second-level protected animals include macaques, pangolins, Asian black bears, red pandas, leopards, and civet cats, and first-level national protected plants include yew and dove tree.

[12] There are mainly four ethnic groups in Xide County: Yi, Han, Hui, and Tibetan.

Xuejia Baozi, the second group of Sijin Village, Mozhen, has been through 9 generations, and in 2006 there were 17 households with 66 people.

[10] In 2018, the industrial added value of Xide County was 335.14 million yuan, accounting for 14.0% of the regional GDP.

Among them, dolomite, granite, marble, basalt, and sandstone for construction have reached the scale of medium-sized or above, and all of them are small-scale mines.

[14] The Wuhe Tomb in Xide County is listed as a national key cultural relic protection unit in China, and the Dengxiangying Ancient Post Station and Xide Deng Mansion are listed as Sichuan provincial key cultural relics protection units.