The Spanish civil guard will assume control of the media when authorities take over the autonomous region next week.
The government says it wants to “guarantee the transmission of truthful, objective and balanced information” as it takes power.
Pro-independence protesters chanted “TV3 is ours” as they marched through Barcelona this afternoon, in protest against a state media run by the government in Madrid.
Spain’s Prime Minister Mariano Rajoy invoked Article 155 of the constitution earlier today, taking control of the autonomous region to impose direct rule as it battles for independence.
Catalan leader Carles Puigdemont and his government ministers will be deposed, with only the parliament left in session.
Mr Rajoy will also ensure new regional elections are held in Catalonia within the next six months.
Until that time the Spanish government will have total control in the region.
Spain’s public prosecutor is also preparing a lawsuit against Mr Puigdemont over the independence vote.
He could be facing a prison sentence of up to 30 years for organising a “rebellion” against the Spanish constitution.
The crime of rebellion is defined as an uprising designed to “repeal, suspend or totally or partially modify the Constitution” or “declare independence of a part of the national territory”.
The controversial referendum on Catalonia’s independence has been declared illegal and unconstitutional by Spanish authorities as separatists did not follow proper legal procedure in calling the vote.