The 2020–21 Men's Volleyball Thailand League is the 16th season of the Men's Volleyball Thailand League, the top Thai professional league for men's volleyball clubs.
The season began on 12 November 2020 and is scheduled to conclude in 2021.
The promoted teams are Samut Prakan VC and Rangsit University.
Rangsit University retains its position after relegation in previous season, while Samut Prakan VC reaches a top division for the first time.
Samut Prakan VC replaced Opart 369 (relegated after four years in the top division) and this is the comeback of Samut Prakan VC for seven years before play in Thailand league.