Dechang County, under the jurisdiction of Liangshan Yi Autonomous Prefecture of Sichuan Province, is located in the Anning River Valley, at the eastern edge of the Kang-Tibet Plateau in the Hengduan Mountains, adjacent to Dali City and Miyi County in the south, facing Yalong River and Yanyuan County in the west, adjacent to Xichang City in the north, bounded by Puge County by the ridge of Luoji Mountain in the east, and bordered by Ningnan County in the southeast. It is between 101 ° 54 '- 102 ° 29' E and 27 ° 05 '- 27 ° 36' N, with a total area of 2284 square kilometers. It has jurisdiction over 2 streets, 8 towns and 2 townships.

Dechang has a history of more than 2000 years. It is the only place along the South Silk Road that "reaches the capital in the north and connects Mengzhao in the south". It contains the Phoenix culture, the "nine palaces and eighteen temples" Buddhist and Taoist culture, the Lisu culture, the Red Army red culture, and the historical and folk culture. The national key cultural relics from the Warring States Period to the Western Han Dynasty are known as the "pyramid of China". There are the provincial protected cultural relics, such as the Bell and Drum Tower, the Ziku Tower, the only Lisu culture in Liangshan, 23 national, provincial and state key cultural relics protection units, and 22 intangible cultural heritage protection lists. "Dechang Mulberry" and "Jianchang Salted Duck" are protected by national geographical indication products and are "the hometown of Chinese fruit and mulberry". It was rated as China's natural oxygen bar, the national greening model county, the city with the most investment value, the natural (health) tourism destination, the top ten most potential forest health destinations in Sichuan Province, the garden county in Sichuan Province, and the provincial rural tourism demonstration county.

By the end of 2020, the permanent population of Dechang County was 21653300. In 2021, Dechang County will achieve a GDP of 8.61 billion yuan; The added value of private economy is 4.595 billion yuan; The growth rate of added value of industries above designated size is 6.9%; 16.8% of the total investment in fixed assets; The total retail sales of consumer goods reached 3.64 billion yuan; Local general public budget revenue is 728.9 million yuan; The per capita disposable income of urban residents is 37441 yuan, and that of rural residents is 22793 yuan.