The Mexican National Heavyweight Championship (called the Campeonato Nacional Completo in Spanish) is a Mexican Lucha Libre (professional wrestling) championship created and sanctioned by the Mexico City Boxing and Wrestling Commission (Spanish: Comisión de Box y Lucha Libre México D.F.).

[2] At that point Empresa Mexicana de Lucha Libre (EMLL, later renamed CMLL) was given the full promotional control of the title, with the Commission only being asked to approve the champions.

[Note 1] After Pierroth Jr. won the title in 1995, he left CMLL and signed with AAA, bringing the Mexican National Heavyweight Championship with him.

When Máscara Sagrada became the champion in 1996, it was officially acknowledged by the Commission that AAA controlled the booking of the championship from that point forward.

The longest Mexican National Heavyweight Championship reign belongs to El Médico Asesino with a total of 1,378 days.