A foamed rubber shoe material is obtained from a rubber shoe base material by vulcanization, foaming, and cutting, the rubber shoe base material includes a rubber sheet and a cloth attached on the rubber sheet, the rubber sheet is prepared from a premixed rubber material in an open mill, the premixed rubber material includes the following components in parts by weight: 44-48 parts of rubber matrix, 24-28 parts of a filler, 5-7 parts of an oil material, 4-5 parts of a vulcanization agent, 1.8-2.2 parts of an antiager, 0.5-0.7 parts of an accelerator, 4-6 parts of triterpenoid saponin, 8-12 parts of n-butanol, 3-5 parts of an unsaturated fatty acid, 7-9 parts of sulfur, 1.6-2.4 parts of dicumyl peroxide, and 10-14 parts of a foaming agent, the foaming agent includes a combination of 4,4′-oxybis(benzenesulfonyl hydrazide), petroleum ether, dichloroethane and at least one bicarbonate, and the rubber matrix includes a natural rubber.