The invention discloses an engineering tire tread rubber which comprises the following components in parts by weight: 100 parts of rubber, 20-50 parts of hard carbon black, 0-20 parts of white carbon black, 1-8 parts of chemically modified short fiber, 0-3 parts of silane coupling agent, 0.5-2 parts of accelerating agent, 0.2-8 parts of anti-reversion agent, 1-2.8 parts of sulfur, 3-6 parts of anti-aging agent, 0.5-4 parts of microcrystalline protective wax, 3-10 parts of aromatic hydrocarbon oil, 0.5-8 parts of processing aid, 1-10 parts of zinc oxide, 1-6 parts of stearic acid and 0.05-1 part of anti-scorching agent. Compared with the prior art, by introducing the chemically modified short fiber, the invention solves the problem of difficult dispersion of the short fiber in the tread rubber, improves the cutting, chunking and chipping resistant properties and the delaying and heating properties of the tread rubber, and improves the wear resistance, the fatigue resistance, the tearing resistance and the cutting resistance of the rubber, thereby prolonging the service life of the engineering tire.