The women, mostly from Myanmar, were found in a Bangkok massage parlour after a tip-off from a teenager who had worked there.
Authorities raided a massage parlour in the city on Friday afternoon after a tip-off from a 14-year-old who said she had sold sex there.
The girl told officers that she had been trafficked from Myanmar when she was 12-years-old to sell her virginity for around 30,000 Thai baht (around £680).
She claimed to have worked in the parlour for two years before being moved to Malaysia where she ran away and was rescued by a charity.
In a joint operation, agents from the Department of Special Investigation and the Interior Ministry swooped on the huge establishment, which is used by Thais and tourists.
Inside, Sky News watched as a large number of officers collected evidence from rooms lined with velvet sofas displaying pornographic photos.
The women, predominantly from Myanmar, have been taken away for further questioning to confirm if they are also trafficking victims.
The head of the department's human trafficking unit, Police Lieutenant Supat Thamthanarug, said the operation sent a clear message that anyone involved in human trafficking in Thailand would be identified and arrested.