| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 233 | Bralon TAPLIN |
GRN |
45.38 Q |
| 2 | 1 | 2 | 171 | Pavel MASLÁK |
CZE |
45.71 Q |
| 3 | 2 | 2 | 321 | Abdalelah Haroun |
QAT |
45.71 Q SB |
| 4 | 3 | 2 | 349 | Lalonde Gordon |
TTO |
46.03 Q |
| 5 | 2 | 1 | 350 | Deon LENDORE |
TTO |
46.23 Q |
| 6 | 3 | 1 | 269 | Boniface Ontuga MWERESA |
KEN |
46.33 Q SB |
| 7 | 4 | 1 | 161 | Nery Brenes |
CRC |
46.49 SB |
| 8 | 4 | 2 | 358 | Yavuz CAN |
TUR |
46.82 |
| 9 | 5 | 1 | 376 | Kyle Clemons |
USA |
46.91 |
| 10 | 5 | 2 | 114 | Alonzo RUSSELL |
BAH |
47.07 |
| 11 | 6 | 2 | 248 | Fitzroy Dunkley |
JAM |
47.13 |
| 1 | 337 | Luka JANEŽIČ |
SLO |
DQ R163.3(b) |