Kalynda Davis, who was held in China on suspicion of smuggling a commercial quantity of methamphetamine, has returned home to Sydney's western suburbs more than a month after she was detained.

Ms Davis' parents said in a statement released by the Department of Foreign Affairs and Trade that they were happy to have her home.

"We have always known Kalynda to be innocent of these allegations. Her return home today is a clear statement of her innocence," the statement said.

Larry and Jenny Davis, of Glenmore Park, engaged solicitors in Sydney and China to facilitate the release of their daughter.