The decision came after fighters on Wednesday attacked two army posts in the remote Mount Chaambi region near the Algerian border, killing 15 soldiers in the worst attack in the Tunisian army's history.
The statement from the office of Prime Minister Mehdi Jomaa said that the authorities had decided to shut down Nour FM radio and Al-Insen satellite channel.
The government said "the immediate closure of the unlicensed" media outlets came after they "turned into platforms for takfiris and jihad".
Many radio and television stations operate in Tunisia without permission, Reuters reported.
The government warned in the statement that it would take "all necessary measures to deal with ... incitement of violence, terrorism and takfir on social networks".
It stressed that "security and military institutions constitute a red line", saying that "any denigrating person, group, party or institution will face prosecution".