Pang Xun (龐勛) (died October 14, 869) was the leader of a major rebellion, by soldiers from Xu Prefecture (徐州, in modern Xuzhou, Jiangsu), against the rule of Emperor Yizong of the Chinese dynasty Tang Dynasty, from 868 to 869. He was eventually defeated by the Tang general Kang Chengxun, who was assisted by the Shatuo general Zhuye Chixin.
It is not known when Pang Xun was born, and little is known about his background other than that he was from Xu Prefecture and that his father Pang Juzhi (龐舉直) was still alive at the time of his eventual rebellion.
Xu Prefecture had a long-standing military tradition in the middle-to-late Tang Dynasty, and had long been the capital of Wuning Circuit (武寧), which was created to control and cut off the communications between the then-rebellious Pinglu (平盧, then-headquartered in modern Tai'an, Shandong) and Zhangyi (彰義, headquartered in modern Zhumadian, Henan) Circuits. However, the soldiers from Xu Prefecture, particularly since the time of the military governor Wang Zhixing, had become arrogant and lax in discipline, such that there were frequent mutinies against military governors (Jiedushi) that the imperial government sent to govern Wuning. For the imperial government, the last straw apparently came in 862, when the soldiers of the Yindao (銀刀, "silver sword") corps mutinied and expelled the imperially-commissioned military governor Wen Zhang (溫璋). The imperial government commissioned the general Wang Shi as Wen's replacement. Wang, once he arrived at Xu Prefecture, had the soldiers that he brought from Zhongwu (忠武, headquartered in modern Xuchang, Henan) and Yicheng (義成, headquartered in modern Anyang, Henan) Circuits slaughter the Yindao soldiers, killing several thousands. Then-reigning Emperor Yizong then issued an edict rebuking the people of and disbanding Wuning Circuit. Xu Prefecture was put under the jurisdiction of Yanhai Circuit (兗海, headquartered in modern Jining, Shandong); of Wuning's other prefectures, Hao Prefecture (濠州, in modern Chuzhou, Anhui) was put under the jurisdiction of Huainan Circuit (淮南, headquartered in modern Yangzhou, Jiangsu); and Su (宿州, in modern Suzhou, Anhui) and Si (泗州, in modern Huai'an, Jiangsu) Prefectures were made into a new Susi Circuit, with its capital at Su Prefecture, but with a lesser status than before — not having a military governor, but only a governor (觀察使, Guanchashi).