The man convicted of one of New Zealand's most notorious child sex abuse cases will fight to clear his name once more.

Peter Ellis, now 61 years old, was jailed for seven years in 1991 after being found guilty of sexually abusing children at the Christchurch Civic Creche.

Allegations from at least seven young children claim Ellis buried them alive, made them dance naked, and placed them in an oven.

Ellis has always maintained his innocence.

He has now filed an application for leave to appeal to the Supreme Court.

Ellis is requesting the court investigate whether there was a miscarriage of justice due to how the children's testimonies were obtained, as well as the lack of expert evidence at his trial.