He was a councilor in the City Council of Parets del Vallès in 1987–2003, and headed the Convergència i Unió (CiU) list in the municipal elections of 1991, 1995 and 1999.

On 2 November 2017, eight members of the Catalan Government, including Jordi Turull, Oriol Junqueras, Josep Rull, Meritxell Borràs, Carles Mundó, Raül Romeva, Dolors Bassa, Joaquim Forn and ex-minister Santi Vila, gave testimony before the Spanish Audiencia Nacional general court.

The prosecutor, Miguel Ángel Carballo, requested unconditional jail for all members of the Catalan Government, including Jordi Turull, which was subsequently decreed by the magistrate, Carmen Lamela.

[10][11] One day later, on 23 March 2018, the magistrate of the Spanish High Court, Tribunal Supremo, Pablo Llarena sent him back to prison,[12] together with the former president of Parliament Carme Forcadell and the ministers Raül Romeva, Josep Rull and Dolors Bassa.

[14] Between 1 and 21 December 2018, Turull and Jordi Sànchez started a hunger strike in order to 'raise awareness' of unfair treatment by Spain and to denounce that Spanish courts are refusing to process numerous appeals in relation to their cases.

Prime Minister Pedro Sánchez said that he pardoned them because it was the best decision for Spain and Catalonia, but did not overturn their bans from holding public office.