The father of a three-year-old girl killed by a 100kg man who stood on her stomach in a moment of anger says he is "disgusted" by the 9½ year jail sentence handed to his child's killer.

Harley Woodford, 22, was alone with his partner's daughter Bella Lawrence in their Horsham home on September 16, 2015, when he tripped over her as he was tidying up after dinner, the Supreme Court in Melbourne heard on Friday.

His partner had gone for a drive with her two other children to try to settle the couple's baby.

Bella, who weighed less than 14 kilograms, was rolled onto her back.

Woodford reacted "in sudden anger", stepping on her stomach with his full 100kg weight, Justice Jane Dixon said.