| 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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