Queensland Treasurer Curtis Pitt has admitted Labor's mid-campaign backflip on Adani's Commonwealth loan was in response to public opinion.

"I think what this shows is that we're a government that responds and listens to the concerns that are being raised," Mr Pitt told 7.30.

Premier Annastacia Palaszczuk had insisted the policy change was not related to opinion polls but was a response to a perceived conflict of interest with her partner working for an Adani consultant.

Mr Pitt was previously a supporter of Adani's application for a loan of up to $1 billion from the Commonwealth's National Australia Infrastructure Facility (NAIF) to build a railway line for the proposed Carmichael coal mine.

"The Queensland Government is willing to provide support and to seek to ensure NAIF objectives can be achieved," he said in a letter to the federal resources minister in February last year.

The letter listed Adani's Galilee Basin Rail and Port Developments as one the Queensland Government's "Potential NAIF candidate projects".

The Cairns-based Treasurer now says he fully supports the Premier's Adani loan veto decision.

"A decision has been made which is a change of position, and that's important to note," he said.

"I back the Premier 100 per cent."

Labor won't 'use taxpayers' money to back Adani'

An anti-coal protester disrupts the Premier's election announcement. ( AAP: Darren England )

Other North Queensland Labor MPs denied there was even a policy backflip.

"No not all," said Aaron Harper, whose electorate of Thuringowa takes in the western suburbs of Townsville.

"We made it very clear to the people of Queensland that we would not use taxpayers' money to back Adani," he told journalists this week.

The member for the northern Cairns seat of Barron River, Craig Crawford, said the Premier's Adani veto announcement was well received in his electorate.

"People are quite happy about that," he said.

"It splits the two major parties in the contest of this seat."

'Government having an each-way bet'

Greens candidate for South Brisbane Amy McMahon says the change of policy is confusing voters. ( ABC News )

South Brisbane Greens candidate Amy McMahon said the announcement had not gone down well in the inner city.

"The people we've been speaking to are still really confused, they're still really unhappy with the fact that Adani is still on the table," she told 7.30.

"People can still see the Government is still trying to have an each-way bet."

The Premier denied the Adani issue was becoming a problem for her campaign.

"Not at all, because as I've said very clearly, we support the project but it needs to stack up financially, independently, it needs to stand on its own two feet," she said.

Opposition Leader Tim Nicholls remained committed to facilitating the NAIF loan which, by law, must be administered through the Queensland Government.

"The LNP will not sacrifice the jobs of the people of North Queensland simply to do a deal with inner-city Greens to preserve power," he said.

NAIF is expected to make a decision on Adani's loan application by the end of this year or early next year.