| Final 18:55 | time | | L | | 1. Xu Jiayu |  China | 52.34s | =GR | 4 | | 2. Ryosuke Irie |  Japan | 52.53s | | 5 | | 3. Lee Ju-ho |  South Korea | 54.52s | | 2 | | 4. Masaki Kaneko | Japan | 54.61s | | 6 | | 5. Li Guangyuan | China | 55.01s | | 3 | | 6. Lê Nguyễn Paul |  Vietnam | 55.72s | | 7 | | 7. Srihari Nataraj |  India | 56.19s | | 8 | | 8. I Gede Siman Sudartawa |  Indonesia | 58.82s | | 1 |
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| Venue: GBK Aquatic Center. |
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Heats - Sunday 19.08 Morning session 09:53 |
| Ranking | time | | L | H | | 1. Xu Jiayu | China | 53.60s | Q | 4 | 4 | | 2. Ryosuke Irie | Japan | 53.85s | Q | 4 | 3 | | 3. Li Guangyuan | China | 54.34s | Q | 5 | 4 | | 4. Masaki Kaneko | Japan | 54.81s | Q | 4 | 2 | | 5. Lee Ju-ho | South Korea | 55.03s | Q | 5 | 3 | | 6. Lê Nguyễn Paul | Vietnam | 55.47s | Q | 3 | 2 | | 7. I Gede Siman Sudartawa | Indonesia | 55.48s | Q | 3 | 4 | | 8. Srihari Nataraj | India | 55.86s | Q | 6 | 1 | | eliminated in Heats | | 9. Francis Fong |  Singapore | 56.09s | | 6 | 4 | | 10.Merdan Atayev |  Turkmenistan | 56.20s | | 3 | 3 | | 11.Kang Ji-seok | South Korea | 56.24s | | 5 | 2 | | 12.Chuang Mu-lun |  Taipei | 56.56s | | 6 | 2 | | 13.Ricky Anggawijaya | Indonesia | 57.33s | | 6 | 3 | | 14.Tern Jian Han |  Malaysia | 57.71s | | 2 | 3 | | 15.Chang Hou-chi | Taipei | 57.83s | | 2 | 4 | | 16.Arvind Mani | India | 58.09s | | 2 | 1 | | 17.Lau Shiu Yue |  Hong Kong | 58.38s | | 7 | 3 | | 18.Kasipat Chogratin |  Thailand | 58.55s | | 2 | 2 | | 19.Cheung Yau Ming | Hong Kong | 59.14s | | 7 | 4 | | 20.Syed Muhammad Naseeb Tariq |  Pakistan | 59.20s | | 1 | 4 | | 21.Abdulaziz Al-Obaidly |  Qatar | 1:02.28 | | 1 | 2 | | 22.Yum Cheng Man |  Macau | 1:02.63 | | 8 | 4 | | 23.Demuul Erdenemunkh |  Mongolia | 1:03.80 | | 1 | 3 | | 24.Buyantogtokh Boldbaatar | Mongolia | 1:05.43 | | 8 | 3 | | 25.Kawas Behram Aga | Pakistan | 1:05.51 | | 8 | 2 | | 26.Hassan Al-Obaidan | Qatar | 1:08.62 | | 3 | 1 | | 27.Imaan Ali |  Maldives | 1:10.03 | | 4 | 1 | | 28.Haish Hassan Hussain | Maldives | 1:13.65 | | 5 | 1 |
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