| Tian Xiusi | |
| Native Name: | 田修思 |
| Native Name Lang: | zh-cn |
| Office: | 12th Political Commissar of the PLA Air Force |
| Term Start: | October 2012 |
| Term End: | July 2015 |
| Predecessor: | Deng Changyou |
| Successor: | Yu Zhongfu |
| Office1: | Political Commissar of the Chengdu Military Region |
| Term Start1: | December 2009 |
| Term End1: | October 2012 |
| Predecessor1: | Zhang Haiyang |
| Successor1: | Zhu Fuxi |
| Office2: | Political Commissar of the Xinjiang Military District |
| Term Start2: | December 2004 |
| Term End2: | December 2009 |
| Predecessor2: | Yu Linxiang |
| Successor2: | Wang Jianmin |
| Birth Place: | Mengzhou, Henan, China |
| Party: | Chinese Communist Party (expelled) |
| Allegiance: |  China |
| Branch: | People's Liberation Army Air Force |
| Serviceyears: | 1968–2015 |
| Rank: | General |
| Battles: | Battle of Laoshan |
Tian Xiusi (; born February 1950) is a retired Chinese general who served as Political Commissar of the People's Liberation Army Air Force. Previously, he was a standing committee member of the Chinese Communist Party Xinjiang committee and the political commissar of the Xinjiang Military District, as well as political commissar of the Chengdu Military Region.[1] In July 2016, Tian was placed under investigation for "serious violations of discipline".[2]
Tian was born in Dongshuiyun Village, Houcun Town, Mengzhou, Henan Province. He joined the Chinese People's Liberation Army in 1968 and served in Xinjiang for more than three decades. He attained the rank of lieutenant general in July 2006,[3] and general in July 2012. A veteran of the 1984 Battle of Laoshan of the Sino-Vietnamese conflicts, Tian was one of the few Chinese generals of his generation with actual battle experience.[1] He succeeded General Zhang Haiyang as political commissar of the Chengdu Military Region in 2009.[1] In 2012, he replaced and General Deng Changyou as the 12th political commissar of the People's Liberation Army Air Force, even though he had never served in the Air Force.[4]
Tian retired from active service in July 2015, after having reached the age of 65. He was replaced by Lt. General Yu Zhongfu.[1] After retiring from military service, he was named a deputy chair of the National People's Congress Foreign Affairs Committee in August 2015.[5]
Tian was a member of the 17th and 18th Central Committees of the Chinese Communist Party.[1]