The Mexican National Heavyweight Championship (called the Campeonato Nacional Completo in Spanish) is a Mexican Lucha Libre (professional wrestling) championship created and sanctioned by "Comisión de Box y Lucha Libre Mexico D.F." (the Mexico City Boxing and Wrestling Commission). While the Commission sanctions the title, it does not promote the events in which the Championship is defended. From 1933 until the mid-1990s, Consejo Mundial de Lucha Libre (CMLL) controlled the Championship, since then Asistencia Asesoría y Administración (AAA) has controlled the championship, after the Commission granted them the right to the title. In 2006 the title inactivated and replaced by the AAA World Heavyweight Championship but in late 2009 it became active again. As the Championship is designated as a heavyweight title, the Championship can only officially be competed for by wrestlers weighing at least 105 kg. However, the regulation is not strictly adhered to.
Being a professional wrestling championship, it is not won legitimately: it is instead won via a scripted ending to a match or awarded to a wrestler because of a storyline. The earliest documented use of the Mexican National Heavyweight Title was in 1926 and as such the Mexican National Heavyweight Championship was the oldest continuously promoted wrestling title in the world at the time of its inactivation. The earliest recorded champion was Francisco Aguayo. When Empressa Mexicana de Lucha Libre (EMLL, later renamed CMLL) was founded in 1933, it was given the full promotional control of the title, with the Commission only being asked to approve the champions.<In this, "control" refers to the every day use of the title, determining which storylines the title is being used it, who gets to challenge for the title, how to use it in a public relations sense. 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. El Halcón, also billed as Halcón Ortiz and Super Halcón, has the record for most championship reigns, with five. The Championship was inactive for several years, starting on September 13, 2006 where it was one of the four titles eliminated to make room for the new AAA World Heavyweight Championship. In the fall of 2009 Charly Manson left AAA, bringing the Mexican National Championship belt with him to defend on the independent circuit. The longest reign belongs to Charly Manson with 2088 days, although the title was inactive for several years. The longest active title reign belongs to El Médico Asesino, who held the title for 2074 days. Mr. Águila was champion for the shortest time, 42 days. The current champion is X-Fly, having won the title from Charly Manson on February 21, 2010 at a Perros del Mal Producciones show. X-Fly is the first "Independent" champion crowned in the title's history.
|Reign||The reign number for the specific set of wrestlers listed|
|Event||The event promoted by the respective promotion in which the titles were won|
|N/A||The specific information is not known|
|—||Used for vacated reigns so as not to count it as an official reign|
|(n)||Indicates that a title change took place "no later than" the date listed.|