Flame retardant rubber and preparation method thereof

The invention relates to flame retardant rubber and a preparation method thereof. The flame retardant rubber is prepared from the following raw materials in parts by weight: 100 parts of natural rubber matrix, 2-4 parts of vulcanizing agents, 2-4 parts of accelerants, 1-10 part of a fire retardant, 2-6 parts of processing agents and 3-5 parts of anti-aging agents. According to the invention, compared with the prior art, the center temperature of the thermal weight loss of the flame retardant rubber is 396.3 DEG C, and the burning rate is 19.48 mm/min, so that dendriform organic montmorillonite can be modified into natural rubber, the flame retardant and natural rubber with good inflaming retarding performance, thermal stability performance and mechanical performance can be obtained, and montmorillonite can be stripped controllably and dispersed uniformly in a polymer matrix, and has good compatibility with a polymer.