The Parisian club has now won the prestigious trophy on fourteen different occasions.
The Parisian giants required a stoppage-time leveler followed by a successful spot-kick decider to overcome Marseille in Kuwait and secure a fourth straight Trophee des Champions victory.
The European champions seemed to be sailing towards a comfortable triumph in the match between the Ligue 1 winners and the Coupe de France winners after Ousmane Dembele found the net in the opening stages.
Yet, Marseille struck twice late to seize a shock lead. First, the English forward converted from the penalty spot, before Willian Pacho inadvertently directed the ball into his own net for an own goal.
In a remarkable twist of fortune, the Portuguese striker grabbed a vital leveler in the dying seconds to force the contest into a deciding shootout. The Parisian shot-stopper Lucas Chevalier then stood as the hero, stopping decisive kicks from O'Riley and Hamed Traore.
In the shootout, Goncalo Ramos, Vitinha, the full-back, and Desire Doue all scored successfully for PSG to seal a convincing penalty victory.
The record winners PSG, who faced last season's Ligue 1 second-placed team Marseille after achieving a domestic double, have now won this competition for the 12th time in the past 13 years.