The invention relates to a rubber foaming sole material and a manufacturing method thereof, and especially relates to a manufacturing method of the sole footwear products which has high requirements on lightweighting, the flame retardation performance and the wear resistance. The material comprises the following compositions: a chlorosulfonated polyethylene rubber (CSM), a butadiene rubber (BR), a natural rubber (NR), a plasticizer, a strengthening agent, an activator, a coupling agent, a vulcanizing agent, an accelerating agent, and an antioxidant. In the invention, a series of sole materials are prepared through screening coupling agents, accelerating agents, activators, foaming agents, and fire retardants and reasonably controlling a technology on the basis of rubbers, softening oil and the strengthening agent, the lightweight and flame retardation footwear outsole material which has a density of 0.8-1.0g/cm<3> and has a maximum heat release rate of equal to or less than 110kW/m<2>and a DIN abrasion of equal to or less than 120mm<3> in tests with a tapered calorimeter is obtained through optimizing the formula and the technology. The material has the following advantages: 1, the specific gravity is light, and the flame retardation and the wear resistance are excellent; 2, the heat resistance and the light resistance are good, and the fire retardant is not easy to migrate from the surface; and 3, toxic gases of polybrominated dibenzo-p-dioxin (PBDD) and polybrominated dibenzo-furan (PBDF) are not released in combustion when a sole is discarded.