The Victorian Aboriginal Community Controlled Health Organisation (VACCHO) says it is "deeply disappointed and angered" by the Victorian government's proposed youth justice changes.

The new policy would allow children as young as 14 to be treated as adults in the court system, continuing what VACCHO called "a worrying trend" from the Victorian government, reflecting "a shift toward punishment rather than the early intervention and support our children need".

The Aboriginal health peak body's CEO, Dr Jill Gallagher AO, said on Wednesday she strongly rejects this punitive approach, calling for genuine investment in community-led, culturally safe, early intervention and support services.

"If the Government truly wants safer communities, it starts with investing in our young people; not locking them away and doubling down on punishment," she said.

"Pushing our boorai (children) into adult systems will only deepen this harm and widen the gap the government claims it wants to close."

Aboriginal children in Victoria are already disproportionately represented in the youth justice system, and VACCHO has long maintained that keeping children in contact with the criminal justice system only deepens intergenerational trauma and disadvantage.

VACCHO noted the Allan government's announcement comes "despite years of expert advice, international human rights standards, and clear evidence from Community that early intervention works".

The legislation will require amendments to the Crimes Act, the Children, Youth and Families Act, and the Youth Justice Act.

"We want the courts to treat these violent children like adults, so jail is more likely and sentences are longer," Premier Jacinta Allan said.

"Adult time for violent crime will mean more violent youth offenders going to jail, facing serious consequences."

VACCHO said there should be a greater focus and investment in evidence-based trauma informed intervention programs that address the causes of offending behaviour, and providing targeted supports and interventions that reduce, rather than increase, the likelihood of reoffending.

The government's plan has also been condemned by the Victorian Aboriginal Legal Service, the Human Rights Law Centre, the Greens, Shara Clarke Aboriginal Restorative Justice Services, 54 Reasons, Senator Lidia Thorpe, the Commission for Children and Young People, Jesuit Social Services, and the National Network for Incarcerated and Former Incarcerated Women and Girls.

Senator Thorpe has urged Federal Minister for Indigenous Australians Malarndirri McCarthy to follow through on her commitment to impose sanctions on states and territories that undermine Closing the Gap targets, saying Victoria "must be put on notice" over the plan.