Labor deputy leader Tanya Plibersek believes voters would be "horrified" by another hung parliament.
The latest opinion polls have the two major parties at 50-50, raising the possibility of a similar result to 2010, which saw Julia Gillard govern with the support of Greens and independent MPs.
Prime Minister Malcolm Turnbull told reporters in Brisbane, on day two of the July 2 election campaign, there was "absolutely no chance" he would accept the minor party's support in minority government.
Labor leader Bill Shorten, campaigning in Townsville, said there would be "no deals" with the Greens.
"We're in it to win it," he said.
But Ms Plibersek went further in her condemnation of the Greens, saying the compromises made by the Gillard government had "cost us quite dearly".
"I think Australians would be horrified by the idea of another hung parliament," she told ABC radio.
Nationals leader Barnaby Joyce seized on the comment saying it sounded like Ms Plibersek didn't think the Labor government - of which she was a key member - had worked very well.
Greens MP Adam Bandt said voters would expect political leaders to have "reasonable discussions" about forming minority government in the event of a hung parliament, describing Mr Shorten's words as "bluff and bluster".
"When people look back they will see the period of 2010 parliament as one of the most productive in Australia's history," he said.
Mr Turnbull said a Labor-Greens government would relax Australia's borders and bring in a higher carbon tax than that already proposed under Mr Shorten's emissions trading scheme.
"It will be Julia Gillard's government being re-enacted by Bill Shorten," he said.
However, the prime minister declined to say whether the coalition would do preference deals with the Greens in some metropolitan seats where it would be beneficial.
Preferences were determined by the Liberal Party federal director in consultation with the organisation, he said.
Mr Shorten faced questions about Labor's asylum-seeker policy after at least seven ALP candidates and retiring members spoke against the party's support for boat turnbacks.
"Regardless of who wins the election, we are not going to allow ruthless criminal syndicates to exploit vulnerable people, put them on unsafe vessels and then be confronted with the risk and reality of drownings," Mr Shorten told reporters.
The opposition leader talked up Labor's plan to fully fund the Gonski school reforms, while Mr Turnbull visited a Brisbane business to spruik his economic vision.
Former independent MP Tony Windsor, who many saw as instrumental in establishing the hung parliament, rejected claims it was a period to be ashamed of.
"I am quite proud of what I was able to achieve. The royal commission into child abuse would never have happened in a majority parliament," said Mr Windsor, who is again vying for the seat of New England.
The national disability support scheme, national broadband network and the Murray Darling basin plan were among the hung parliament's achievements, he said.
"The list goes on and on ... I don't have a problem talking about the achievements, there are many of them," he said.
