Opposition Leader Angus Taylor said the coalition would introduce legislation in March making it illegal to assist in the repatriation of people who have gone to declared terror hot spots or committed a terrorist offence.
The proposal comes as 34 Australian women and children linked to Islamic State fighters attempt to return to Australia after being held in a Syrian refugee camp since the militant group's defeat.
While one person from the group has been given a two-year temporary exclusion order barring their return, other members of the so-called "ISIS bride" cohort have been granted Australian passports as they are citizens.
Mr Taylor said more needed to be done to ensure members of the cohort were unable to return to Australia.
"We need to shut the door to people who are going to bring hate and violence to our shores from another part of the world," he told reporters on Monday.
"Labor needs to be upfront with the Australian people about what's going on here. But most of all, Labor needs to support this legislation."
The proposal has prompted concern aid workers supporting the cohort overseas would be captured by the legislation.
Save the Children chief executive Mat Tinkler said the group was not helping with repatriation but providing humanitarian relief for those in Syrian refugee camps.
He said any attempt to criminalise helping children overseas would be extraordinary.
"Instead of investing effort in ways to stop help for innocent Australian children, politicians should be focused on finding ways to protect them," he said.
"No Australian child should be left stranded in dangerous desert camps for seven long years, and both sides of government have previously recognised this by repatriating groups of Australian children and women in the past."
Opposition home affairs spokesman Jonathon Duniam said the legislation didn't target particular groups.
"It is about targeting anyone who breaks the law. That's what we're doing here, because, as we know, there are individuals here who, with the tacit approval of this government, are allowing these people to return," he said.
In 2022, four women and 11 children returned to Australia and in 2019, eight orphaned children were repatriated from Syria under the then-coalition government.
Senator Duniam dismissed concerns the coalition's proposed laws would fall foul of a High Court challenge.
"The constitutional risk or legal risk is not a reason to do nothing," he said.
The opposition's proposal would apply in circumstances where the government has given "express permission" for repatriation to occur.
Prime Minister Anthony Albanese said the proposal should be ignored.
"They don't have serious plans. If they did, they wouldn't have allowed more than 40 people to come, including fighters, on their watch when they were in government," he told reporters earlier on Monday.
"We, of course, have advice, but it's the same advice that, frankly, the coalition got ... which is why the laws that are in place are the laws put there by the coalition.
"Our position is we're not repatriating people and we're not providing assistance."
Opposition foreign spokesman Ted O'Brien said non-government organisations could be captured under the proposed laws, but self-managed returns of the women and children was a loophole that needed to be closed.
