| Final 19:10 | time | | L | React. | Rk. | bib | | 1. Abderrahman Samba |  Qatar | 47.66s | GR | 6 | 0.169 | 1. | 713 | | 2. Ayyasamy Dharun |  India | 48.96s | PB | 4 | 0.153 | 2. | 323 | | 3. Takatoshi Abe |  Japan | 49.12s | | 5 | 0.199 | 3. | 459 | | 4. Chen Chieh |  Taipei | 49.62s | SB | 3 | 0.154 | 4. | 243 | | 5. Santhosh Kumar Tamilarasan | India | 49.66s | | 7 | 0.173 | 5. | 340 | | 6. Dmitriy Koblov |  Kazakhstan | 50.60s | | 8 | 0.141 | 7. | 511 | | 7. Eric Cray |  Philippines | 51.53s | | 2 | 0.112 | 6.q | 681 | | 8. Han Se-hyun |  South Korea | 51.65s | | 1 | 0.140 | 8.q | 557 |
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| Venue: Gelora Brung Karno Stadium | | Indonesian Western Standard Time (UTC) +7. | | Heats |
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| World Record: Kevin Young (USA) 46.78s Barcelona, Spain 6 August 1992 | | Asian Record: Abderrahman Samba (QAT) 46.98s Paris, France 30 June 2018 | | Games Record: Hadi Soua'an Al-Somaily (KSA) 48.42s Busan, South Korea 8 October 2002 |
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Heats - Saturday 25 August 11:10 | | First 2 and best 2 advanced to Final. 3 Heats with 22 Athletes. |
| Ranking | time | | L | Rk. | | 1. Takatoshi Abe | Japan | 49.71s | Q | | 3. | | 2. Dmitriy Koblov | Kazakhstan | 50.58s | Q | | 7. | | 3. Francis Medina | Philippines | 51.68s | | | 14. | | 4. Han Se-hyun | South Korea | 50.69s | q | | 8. | | 5. Andrian Andrian |  Indonesia | 51.93s | | | 15. | | 6. Abdullah Rizqallah Mulahyi |  Saudi Arabia | 52.42s | | | 16. | | 7. Feng Zhiqiang |  China | DNS | | | |
| Ranking | time | | L | Rk. | | 1. Chen Chieh | Taipei | 50.30s | Q | | 4. | | 2. Santhosh Kumar Tamilarasan | India | 50.46s | Q | | 5. | | 3. Takayuki Kishimoto | Japan | 50.95s | | | 10. | | 4. Mehboob Ali |  Pakistan | 51.27s | | | 12. | | 5. Cai Junqi | China | 51.37s | | | 13. | | 6. Halomoan Edwin Binsar | Indonesia | 53.28s | | | 17. | | 7. Phan Khắc Hoàng |  Vietnam | 53.47s | | | 18. |
| Ranking | time | | L | Rk. | | 1. Abderrahman Samba | Qatar | 49.34s | Q | | 1. | | 2. Ayyasamy Dharun | India | 49.55s | Q | | 2. | | 3. Eric Cray | Philippines | 50.54s | q | | 6. | | 4. Yu Chia-hsuan | Taipei | 50.84s | | | 9. | | 5. Reza Malekpour |  Iran | 50.99s | | | 11. | | 6. Pipatporn Paungpi |  Thailand | 53.74s | | | 19. | | 7. Chan Ka Chun |  Hong Kong | 53.94s | | | 20. | | 8. Quách Công Lịch | Vietnam | DNF | | | |
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