A Turnbull government backbencher has called for Australia to start grilling Muslim immigrants about their beliefs in a bid to 'weed out extremists.'

Queensland LNP senator Barry O'Sullivan also said the government should keep a close eye on Muslims who adhere to strict Sharia Law, and focus on winning back Coalition voters who turned to Pauline Hanson.

He rejected Ms Hanson's calls for a ban on Muslim immigration but said Muslims must face greater scrutiny before they're allowed to live in Australia.

Queensland Liberal National Party senator Barry O'Sullivan said the Australian government should start grilling Muslim immigrants about their beliefs to 'weed out extremists'

Mr O'Sullivan said the existing immigration 'filter' simply wasn't working and all migrants should be assessed on their beliefs, with extremists including radical Muslims and members of right-wing Christian cults rejected.

'Everyone who comes to this nation needs to be confronted with the question about their beliefs,' Senator O'Sullivan told The Courier-Mail.

'We spend a lot of time asking about someone's kidney function or bank balance. We don't even ask about their religious beliefs.'

'If you are a devotee to a religion that is ... also the legal platform for you, as is the case with Sharia law, we need to find out.'

Mr O'Sullivan said he disagreed with Pauline Hanson's calls for a ban on Muslim immigration but said Muslims must face greater scrutiny before they're allowed to live in Australia

He said the government could not ignore issues that led to former Coalition supporters electing Ms Hanson and three of her One Nation colleagues to the Senate, on the back of a raft of anti-Islam policies.

'The political issue is not going to go away,' he said.

'Any responsible government has to listen to the heartbeat of the Australian population, listen to what their ideals are on issues like immigration and respond accordingly.'