A former Catholic priest is accused of 124 child sex offences after scores of additional charges were laid against him.

The 59-year-old man faced Armidale Local Court, in the NSW New England region, on Wednesday, when prosecutors laid 64 fresh charges.

He remains on bail until his next appearance in the same court on July 3.

Police allege the offences relate to alleged assaults on a boy and two girls, aged from nine to 19, that took place in the early 1980s at Moree, Narrabri, Inverell and Armidale.

The charges include 11 counts of sexual intercourse without consent, 52 counts of indecent assault and one count of committing an act of indecency.

He was charged in January with 35 offences relating to the sexual abuse of six altar boys, aged 11 and 12, in the early 80s.

The former priest was originally charged in October last year with 25 child sex offences against three girls in the 70s and 80s.

The new charges follow continuing investigations by Strike Force Glenroe established in July last year.