In order to alleviate the environmental pollution caused by urban solid waste, waste food bags, handbags, garbage bags, express bags, paper scraps, straw and soil are taken as raw materials and then are mixed together according to the corresponding proportions; and the obtained urban hydrocarbon solid waste is pretreated by granulation and used for blast furnace injection, and the composition of granulation products, ignition point, explosiveness, combustibility, gasification and other blast furnace injection characteristics are studied. The results show that the volatile matter, fixed carbon and ash mass fractions of urban hydrocarbon solid waste granulation products are 61.56%, 19.02% and 19.42%, respectively, with higher calorific value of 25 497.3 kJ/kg. The ignition point of the granulated product is 241 ℃, and the ignition point is increased when mixed with anthracite. The granulation product is highly explosive, and the explosiveness is weakened when mixed with anthracite. After the granulation product is mixed with anthracite, its combustion performance and reaction performance are significantly improved. The addition ratio of the granulated product is 40%, which can not only ensure the safe injection of the blast furnace, but also promote the combustion of anthracite, and the production of 1 t of pig iron can reduce the carbon emission by up to 190.4 kg. The results show that urban hydrocarbon solid waste can be used as a high-quality fuel for blast furnace injection, and at the same time, it can reduce the carbon emissions of blast furnace process to a certain extent.