"We will not accept any religious demands in school menus," Le Pen told RTL radio. "There is no reason for religion to enter the public sphere, that's the law."
Considering pork is forbidden under Jewish and Muslim dietary law, her comments have sparked a significant backlash.
But she defended the decision saying it was necessary to "save secularism".
Le Pen launched a fierce row before 2012’s presidential elections when she claimed all meat from abatoires in the Paris region was prepared using Islamic halal traditions and non-Muslim consumers in the capital were being misled.
Her anti-immigrant party made historic gains in last week's municipal elections, which was seen as a significant electoral breakthrough for the party.
But the French politician was fined 10,000 euros (£8,268) on Thursday over fake flyers distributed by National Front workers during 2012 legislative elections pretending to show a far-left rival calling for "Arab" votes in Arabic.
