The Ligue 1 and French Super Cup champions overwhelmed the primary half at Lille's Stade Pierre-Mauroy to get their record-broadening fifteenth Cup title and first beginning around 2021.
Dembele put PSG ahead following 23 minutes when Nuno Mendes' cross found him plain in the six-yard box to coolly head home, and Ruiz multiplied the benefit with a strike from a tight point at the subsequent endeavor.
Lyon maneuvered one back 10 minutes into the final part because of Jake O'Brien's transcending header off a corner before PSG manager Gianluigi Donnarumma delivered a heavenly save minutes after the fact.
PSG's unsurpassed top scorer Kylian Mbappe neglected to find the net in his last game for the club, leaving his record at 256 objectives in 308 appearances over his seven-year spell.