A Melbourne mother who crashed a four-wheel drive packed with unrestrained children has been sentenced to three months in prison.

Tanya Chilly, 35, was drink driving when she rolled her four-wheel drive at Rockbank in Melbourne's west last year.

Prosecutor Ray Gibson told the court the mother of seven had a blood alcohol reading of 0.233.

The car was carrying an adult passenger, a baby in a car seat and nine unrestrained children when Chilly lost control and crashed on the dirt road.

Three children were seriously injured in the crash and two required surgery.

Chilly initially denied being the driver but later admitted she was behind the wheel.

She told police the car rolled because she was driving too fast and she tried to blame the other adult passenger.

"I guess I was trying not to go to jail," she said.

Chilly pleaded guilty to 14 charges including dangerous driving, driving while unlicensed, failing to restrain children and drink driving.

She will serve three months in prison followed by an 18-month community corrections order.