The champions league round was the next stage from the regional stage of 2019 Thai League 4. The winners and runners-ups of each regions would qualified to this round to finding 4 clubs promoting to 2020 Thai League 3.[1]
Note:
Winners, runners-up, third place, and fourth place of 2019 Thai League 4 would promoted to 2020 Thai League 3.[2][3]
Muang Loei United won 7–3 on aggregate.
2–2 on aggregate. Wat Bot City won 6–5 on penalties.