The Australian Greens have condemned the funding cuts to indigenous legal aid services, which will see the peak body NATSILS close its doors in June.

Spokesperson for legal affairs Senator Penny Wright said the National Aboriginal and Torres Strait Islander Legal Service advocacy was crucial to addressing shocking levels of indigenous incarceration.

"More than one in four prisoners are Aboriginal, despite making up only a fraction of our population. Too many are in jail because of inadequate legal understanding and representation," Senator Wright said.

The Australian Greens have condemned Tony Abbott's cuts to the Indigenous Legal Assistance and Policy Reform Program, saying it goes against all his past rhetoric and will exacerbate the shameful incarceration rates for Indigenous Australians.

"Tony Abbott says he wants to prioritise efforts to end Aboriginal and Torres Strait Islander disadvantage, but cutting Indigenous legal aid funding undermines this commitment," Senator Rachel Siewert, Australian Greens spokesperson on Aboriginal and Torres Strait Islander issues.