Heats

Held on 14 July^[2]

Qualification rule: First 3 in each heat (Q) and the next 4 fastest (q) qualified for the semifinals.

Rank	Heat	Name	Nationality	Time	Notes
1	4	Yusaku Kodama	Japan	50.31	Q
2	2	Eric Cray	Philippines	50.39	Q
3	2	Xie Zhiyu	China	50.47	Q
4	3	Santhosh Kumar Tamilarasan	India	50.50	Q
5	1	Palaksha Yashas	India	50.84	Q
6	3	Kaito Tsutsue	Japan	51.01	Q
7	1	Mehdi Pirjahan	Iran	51.11	Q
8	4	Bassem Hemeida	Qatar	51.18	Q
9	1	Peng Ming-yang	Chinese Taipei	51.27	Q
10	4	Chen Chieh	Chinese Taipei	51.37	Q
11	3	Mohamed Dahim Al-Mouaoui	Saudi Arabia	51.46	Q
12	1	Nathapol Dansoongnern	Thailand	51.52	q
13	3	Vyacheslav Zems	Kazakhstan	51.58	q
14	2	Marc Anthony Ibrahim	Lebanon	51.59	Q
15	4	Dmitriy Koblov	Kazakhstan	51.75	q
16	1	Calvin Quek	Singapore	51.96	q
17	1	Rusleen Zikry Putra Roseli	Malaysia	52.52
18	4	Methasit Krapinu	Thailand	52.76	PB
19	2	Doudai Ismail Abakar	Qatar	53.03
20	2	Phattanan Thorphathong	Thailand	53.50
21	2	Zaid Al-Awamleh	Jordan	55.65	PB
22	3	Dilshodbek Boboqulov	Uzbekistan	53.38
23	4	Muhammad Fakhrul Afizur	Malaysia	54.71
24	3	Leonid Pronzhenko	Tajikistan	55.30
25	4	Siphasouk Botvilaithong	Laos	58.51	PB

Semifinals

Held on 14 July^[3]
Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) qualified for the final.

Rank	Heat	Name	Nationality	Time	Notes
1	2	Yusaku Kodama	Japan	49.45	Q
2	2	Palaksha Yashas	India	49.60	Q
2	2	Xie Zhiyu	China	49.60	Q
4	1	Mehdi Pirjahan	Iran	49.71	Q
5	2	Bassem Hemeida	Qatar	49.81	q
6	1	Eric Cray	Philippines	49.98	Q
7	2	Peng Ming-yang	Chinese Taipei	50.04	q
8	1	Santhosh Kumar Tamilarasan	India	50.06	Q
9	1	Kaito Tsutsue	Japan	50.09
10	1	Chen Chieh	Chinese Taipei	50.19
11	1	Mohamed Dahim Al-Mouaoui	Saudi Arabia	50.80
12	1	Dmitriy Koblov	Kazakhstan	50.81
13	2	Marc Anthony Ibrahim	Lebanon	51.22
14	1	Calvin Quek	Singapore	51.82
15	2	Vyacheslav Zems	Kazakhstan	52.28
	2	Nathapol Dansoongnern	Thailand	DQ	FS

Final

Held on 15 July^[4]

Rank	Lane	Name	Nationality	Time	Notes
	2	Bassem Hemeida	Qatar	48.64	PB
	6	Yusaku Kodama	Japan	48.96
	7	Santhosh Kumar Tamilarasan	India	49.09
4	4	Xie Zhiyu	China	49.19	PB
5	3	Mehdi Pirjahan	Iran	49.55
6	8	Eric Cray	Philippines	49.76
7	1	Peng Ming-yang	Chinese Taipei	50.33
	5	Palaksha Yashas	India	DNS