2019 Asian Athletics Championships – Men's 400 metres

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	3	Julian Jrummi Walsh	Japan	46.00	Q
2	4	Arokia Rajiv	India	46.25	Q
3	1	Taha Hussein Yassen	Iraq	46.27	Q, NR
4	1	Abbas Abubakar Abbas	Bahrain	46.27	Q
5	1	Muhammed Anas Yahiya	India	46.36	Q
6	1	Ashraf Hussein Osman	Qatar	46.54	q, PB
7	4	Rikuya Ito	Japan	46.59	Q, SB
8	2	Mikhail Litvin	Kazakhstan	46.72	Q
9	2	Mehboob Ali	Pakistan	46.96	Q
10	3	Mo Il-hwan	South Korea	47.01	Q
11	2	Mohamed Nasir Abbas	Qatar	47.05	Q
12	2	Yasir Ali Al-Saadi	Iraq	47.15	q
13	2	Phitchaya Sunthonthuam	Thailand	47.31	q
13	3	Ajith Premakumara Millagaha Gedara	Sri Lanka	47.31	Q
15	2	Xu Haoran	China	47.40	q, SB
16	4	Yousef Karam	Kuwait	47.47	Q
17	3	Pan Haitao	China	47.69	SB
18	1	Andrey Sokolov	Kazakhstan	47.93
18	4	Joyme Sequita	Philippines	47.93
20	4	Grigoriy Derepaskin	Tajikistan	47.94	SB
21	3	Mazen Mawtan Al-Yasen	Saudi Arabia	48.24
22	4	Ahmed Al-Yaari	Yemen	48.27	NR
23	1	Mohammad Jahir Rayhan	Bangladesh	48.51
23	2	Kirill Sarasov	Kyrgyzstan	48.51
25	3	Tan Zongyang	Singapore	49.09
26	1	Saeed Bahashwan	Yemen	49.72
27	4	Skhakhzatbek Sadykzhanuulu	Kyrgyzstan	49.95	PB
	3	Hassan Mansour	Lebanon	DNS

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	1	Yousef Karam	Kuwait	45.04	Q, PB
2	1	Abbas Abubakar Abbas	Bahrain	45.27	Q, SB
3	1	Mikhail Litvin	Kazakhstan	45.38	Q, NR
4	1	Julian Jrummi Walsh	Japan	45.67	q
5	2	Arokia Rajiv	India	45.96	Q
6	2	Taha Hussein Yassen	Iraq	46.04	Q, NR
7	1	Muhammed Anas Yahiya	India	46.10	q
8	1	Mo Il-hwan	South Korea	46.17	PB
9	2	Rikuya Ito	Japan	46.52	Q, SB
10	1	Ashraf Hussein Osman	Qatar	46.85
11	1	Yasir Ali Al-Saadi	Iraq	47.01
12	2	Ajith Premakumara Millagaha Gedara	Sri Lanka	47.07
13	2	Mohamed Nasir Abbas	Qatar	47.10
14	2	Phitchaya Sunthonthuam	Thailand	47.15
15	2	Xu Haoran	China	47.23	SB
16	2	Mehboob Ali	Pakistan	47.61