| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Jamaica |
JAM
|
45.01 Q | |
| 2 | Germany |
GER
|
45.69 Q | |
| 3 | Japan |
JPN
|
46.91 q | |
| 4 | South Africa |
RSA
|
47.16 q | |
| 5 | Algeria |
ALG
|
47.89 | |
| 6 | Chinese Taipei |
TPE
|
48.39 | |
| PR of China Youth |
CHN
|
DQ |