| Competition: | Thai League 4 Champions League |
| Nextseason: | 2018 |
The champions league round was the next stage from the regional stage of 2017 Thai League 4. Winners and runners-up of each region would qualified to this round to finding 5 clubs promoting to 2018 Thai League 3.
League positions of the regional stage shown in parentheses.
Note:
13 clubs from all around Thailand would compete in the champions league round. 2 clubs Chiangrai City runners-up from Northern and Phuket runners-up from Southern regions must be play-off to finding one club joining last 12 clubs in group stage.
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| BTU United | Bangkok | Bangkokthonburi University Stadium[1] | 1,500 | |
| Chanthaburi | Chanthaburi | Chanthaburi Provincial Stadium[2] | 4,800 | |
| Chiangrai City | Chiangrai | Chiangrai Provincial Stadium[3] | 5,000 | |
| JL Chiangmai United | Chiangmai | Chiangmai Municipality Stadium[4] | 2,500 | |
| Marines Eureka | Rayong | Klaeng Municipality Stadium[5] | 1,000 | |
| Mashare Chaiyaphum | Chaiyaphum | Chaiyaphum Provincial Stadium[6] | 2,500 | |
| Muangkan United | Kanchanaburi | Kleeb Bua Stadium[7] | 13,000 | |
| Muang Loei United | Loei | Wang Saphung District Stadium[8] | 1,000 | |
| North Bangkok University | Pathum Thani | North Bangkok University Rangsit Campus Stadium[9] | 1,200 | |
| Phuket | Phuket | Surakul Stadium[10] | 15,000 | |
| Samut Prakan | Samut Prakan | Samut Prakarn SAT Stadium (Keha Bang Phli)[11] | 5,000 | |
| Satun United | Satun | Satun PAO. Stadium[12] | 5,000 | |
| Sisaket United | Sisaket | Sri Nakhon Lamduan Stadium[13] | 10,000 |
| Team | Kit manufacturer | Shirt sponsor | |
|---|---|---|---|
| BTU United | Made by club | BTU United | |
| Chanthaburi | FBT | Ban Laem Border Market | |
| Chiangrai City | KAKA | Leo Beer | |
| JL Chiangmai United | FBT | Moose Cider | |
| Marines Eureka | Zealver Sport | Zealver Sport | |
| Mashare Chaiyaphum | 90 Minute | Mashare | |
| Muangkan United | FBT | Chang | |
| Muang Loei United | Made by club | Yamaha | |
| North Bangkok University | Deffo | Thaisri Insurance Group | |
| Phuket | Deffo | Royal Gems Pavilion | |
| Samut Prakan | Sakka Sport | Phou Phieng Coffee | |
| Satun United | Cadenza | SK ZIC | |
| Sisaket United | Ari Football | Toyota Sisaket |
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Team | Manager | Head coach | Captain | Vice-captain | |
|---|---|---|---|---|---|
| BTU United |  Saichon Boonmeerit[14] | Smath Amarttayakul | Sarawut Natasat | Seranee Pimpa | |
| Chanthaburi | Sakchai Sawas[15] | Athit Onkham | Mongkol Damdod | Panadol Leksuwan | |
| Chiangrai City |  Biasi Carlos[16] | Nantawat Tansopa | Nantawat Tansopa | Pannapat Jakeeb | |
| JL Chiangmai United | Wiwat Pongruengkiat[17] | Apichart Mosika | Anggello Machuca | Phichet Hawkongkaew | |
| Marines Eureka | Wuttikrai Pundee[18] | Nakin Thamsuwan | Chaiyut Baothumma |  Sandjo Jislin | |
| Mashare Chaiyaphum | Siriwat Wettayawetin[19] |  Armah Abraham Ayaa | Worawut Termphan | ||
| Muangkan United | Prathet Boonyong[20] | Chatree Korabandit | Apiwat Sompan | Anusorn Promprasit | |
| Muang Loei United | Teerapol Thongdee[21] | Kritsana Obma | Weerapong Boonkong | ||
| North Bangkok University | Damrongsak Boonmuang[22] | Weerayut Jitkuntod | Sirichai Lamphuttha | ||
| Phuket | Thanustup Arjarnyut[23] | Niwat Nuisangar | Jhanawat Arewansuk | Tevarit Junsom | |
| Samut Prakan | Tanaboon Khanato[24] | Issarathorn Punboonchoo | Manasak Jaiton | ||
| Satun United | Worasit Liangprasert[25] | Tawatchai Thonghuad | Anan Ya-ngah | Safaree Nansen | |
| Sisaket United | Ittikorn Thaninthornworakul[26] | Suriyan Jamjaeng | Suebsakul Songbundit | Chatree Rattanawong |
Runners-up of Northern and Southern regions must be play-off to finding only 1 team qualifying to Thai League 4 champions league group stage. Because both regions have only 9 teams that less than all another regions.
Summary|}
Matches
The draw for the group stage was held on 12 September 2017, at the Sports Authority of Thailand (SAT) in Bangkok. The 12 teams were drawn to knock out stage, winners would advanced into two groups of three.
In each group, teams play against each other home-and-away in a round-robin format. The group winners, runners-up, and best third place promote to the 2018 Thai League 3.
Summary|}
MatchesChiangrai City won 6–5 on aggregate.----Chanthaburi won 4–3 on aggregate.----1–1 on aggregate. BTU United won 7–6 on penalties.
Summary|}
MatchesJL Chiangmai United won 5–1 on aggregate.----Muangkan United won 2–1 on aggregate.----2–2 on aggregate. Marines Eureka won on away goals.
The best third-placed team would promoted to 2018 Thai League 3.
Maryson Jone dos Santos (Chiangrai City) Diego Oliveira Silva (BTU United) Nantawat Tansopa (Chiangrai City) Chatri Rattanawong (Sisaket United) Sitthinon Ketkaew (BTU United) Tirawut Thiwato (Chanthaburi) Chatchai Nakvijit (JL Chiangmai United) Pichet Hawkongkaew (JL Chiangmai United)
Taku Ito (JL Chiangmai United) Nattawut Namthip (BTU United) Teerapat Laksameearunothai (BTU United)
Thierry Ratsimbazafy (BTU United) Nattapon Saiyasat (Chanthaburi) Nattawut Ngamthuan (Chanthaburi) Saknarin Pinjaikul (Chanthaburi) Chayanon Khamkan (Chiangrai City) Eakkanit Punya (Chiangrai City) Jetsada Supharit (Chiangrai City) Verdini (Chiangrai City) Kittipong Namsang (JL Chiangmai United)
Tangeni Shipahu (JL Chiangmai United) Nattakarn Kaewkong (Marines Eureka) Noppadon Tornchuay (Marines Eureka) Ittipol Pol-arj (Mashare Chaiyaphum) Kelvin Amdonsah (Mashare Chaiyaphum) Watchara Ritkamlang (Mashare Chaiyaphum) Anuson Phamprasit (Muangkan United) Kedi Amang Ghislain Roger (Muangkan United) Pornthep Klaywongpung (Muangkan United) Chutchawal Nanteenpa (Muang Loei United) Poomipat Kantanet (North Bangkok University) Weerayut Jitkuntod (North Bangkok University) Nattapoom Maya (Phuket) Tevarit Junsom (Phuket) Gabriel Mintah (Samut Prakan) Phanuphong Aintachumpho (Sisaket United) Rattasak Wiang-in (Sisaket United) Nattawat Wongsri (BTU United against Satun United)