BRAWLING school mums have been caught on video outside a Sydney Catholic school fighting in front of children over a car parking space.

Police were called to break up the stoush between angry mothers at the Maronite College of the Holy Family in the western Sydney suburb of Harris Park.

Channel 9 News reports the ruckus began during the afternoon school pick-up on Monday.

As dozens of young children watched on, women yelled at each other while school staffers and other parents tried to intervene and stop them.

Even a nun from the Catholic college tried to keep two women apart before police were called.

An onlooker captured the fight on a mobile phone, and the school later apologised on its Facebook page.

Police have laid no charges.