The midfielder has signed a three-and-a-half-year deal at the Parc des Princes in a deal thought to be worth around £20m.
"The offer from Paris Saint-Germain was hard to refuse," Cabaye told the club's official website. "I want to win titles and PSG offer me that so it is an ideal club. I did not hesitate.
"I am proud to have a chance to be a part of this ambitious project, to have the opportunity to win titles and play in the Champions League.
"The priority for me was the opportunity to win titles, quite simply. That was the biggest thing."
The 28-year-old midfielder leaves Newcastle United after spending three years at the club.