"Since Xi Jinping took power in 2012, China has expanded the legal landscape for exit bans and increasingly used them, sometimes outside legal justification," the Safeguard Defenders report reads.
Attention on the exit bans comes as China-U.S. tensions have risen over trade and security disputes.
The Reuters analysis of records on exit bans, from China's Supreme Court database, shows an eight-fold increase in cases mentioning bans between 2016 and 2022.
Most of the cases in the database referring to exit bans are civil, not criminal.
Some activists say the wider use of exit bans reflects tighter security measures under President Xi.