Vulcanized rubber of natural rubber for improving thermal aging resistance and preparation method of vulcanized rubber

The invention relates to vulcanized rubber of natural rubber for improving the thermal aging resistance. The vulcanized rubber is prepared from the following components in parts by weight: 100 parts of natural rubber, 30-60 parts of carbon black, 5-10 parts of naphthenic oil, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of a quinoline anti-aging agent, 1-1.5 parts of a diphenylamine anti-aging agent, 0.5-1.5 parts of sodium acetate, 0.5-1 part of an element solution agent, 1 part of an accelerant, 3 parts of sulfur and 0.1-0.5 part of a scorch retarder. The vulcanized rubber is prepared through primary mixing, secondary mixing and final mixing. The vulcanized rubber is good in thermal aging resistance and relatively wide in application range as the service life of a vulcanized product made of the vulcanized rubber can be prolonged.