A 41-year-old woman is the first person convicted under Australia's child trafficking laws for prostituting her daughter starting when she was nine years old.

The woman, who can't be named, pleaded guilty to 20 charges including child trafficking, indecent treatment of a child under 12 and maintaining a sexual relationship with a child, the Brisbane Courier-Mail reported.

In 2004, the Thailand-born woman brought her daughter, 9, to Australia and sold her for sexual purposes, court heard. The girl returned to Thailand six weeks later.

The woman ran a massage and prostitution business from her Brisbane home.

In 2006, the 11-year-old left Thailand to live with her mother -- who advertised her daughter as the "new girl" -- and forced her child to take calls as a sex worker until 2011, the newspaper reported.

Court was also told the mother had expectations of marrying her off for money.

The judge rejected defence claims that the child wasn't sold into servitude.

"The child was brought to Australia for that purpose (of sex worker) .... twice, not just once."

She was sentenced to nine years in prison.