The invention discloses a preparation method of a rubber nanometer material. The raw materials for a recovery processing technology comprise inorganic clay, nitrile butadiene rubber (NBR), styrene-butadiene rubber (SBR), crylic acid, absolute ethyl alcohol, n-butyl alcohol, stearic acid, zinc oxide, sulphur and deionized water; the preparation method comprises the following steps: (1) preparing mud slurry from inorganic clay and deionized water (ratio is 1g to 10ml), stirring and dispersing in a constant-temperature water bath kettle at 65 DEG C for an hour, mixing the inorganic clay and an organic modifier at a certain ratio (the mass ratio is 2.5 to 1 or 2.8 to 1 or 4.0 to 1), and further stirring at a constant temperature of 65 DEG C for 2 hours. According to the method, the interval between clay sheets is easy to expand; the prepared intercalated nano-composite material is simple to operate and suitable for industrialized popularization; and the environment is not polluted.