Australia is "in danger of being swamped by Muslims" and could be living under Islamic law if it does not act, Senator Pauline Hanson, a firebrand far-right politician, said Wednesday on her return to parliament.
Hanson heads One Nation, an anti-Islam party that holds four seats, making them a key player in the upper house where Prime Minister Malcolm's Turnbull's ruling coalition is in the minority.
"I call for stopping further Muslim immigration and banning the burqa as they have done in many countries around the world," Hanson told the parliament on Wednesday night in Canberra.
"We are in danger of being swamped by Muslims who bear a culture and ideology that is incompatible with our own."
"If we don't make changes now ... have no doubt we will be living under sharia law and treated as second-class citizens," she said.
Rival Greens Party members walked out of the chamber half-way through her speech.
According to census data, around 2.2 per cent of Australia's population of 24 million are Muslim.
Hanson, a former fish-and-chip shop owner, first entered parliament in the mid-1990s with an anti-multiculturalism agenda.
In 1996, when she was first elected a senator, she made similar comments in her maiden speech, but referring to "Asians."
Hanson was elected for one term, and had not managed to re-enter politics until a general election in July.
"I'm back but not alone," she said.
Hanson also called for a ban on the construction of new mosques or Islamic schools and monitoring of current ones.