The Greens are proposing single parents receive a top-up to their welfare payments of up to $127 a week.
The Federal Government this year moved thousands of single parents onto the lower unemployment payment, Newstart.
The changes meant parenting payments were cut by up to $110 a week.
Deputy Greens leader Adam Bandt told the ABC's Insiders program his plan would effectively reverse those cuts.
"Labor really slugged single parents, especially those from January 1 this year who are forced to live on Newstart," he said.
"We're going to put forward a proposal that will allow single parents to work more hours, keep more of that money and have greater rights to flexible working arrangements with their employers, together with a small funding boost."
Mr Bandt says his proposal would cost an extra $340 million a year.
"You could pay for that just by closing one of the loopholes in the mining tax and you'd have change left over," he said.
"The people of Australia want to change the mining tax. The majority of the population is on our side. That we need a mining tax and/or that it should be increased.
"Let's raise the revenue to fund the services that Australians expect."