The invention discloses a
whisker /
silicone rubber composite and a preparation method thereof. The preparation method includes the steps that A, 100 parts of vinyl polysiloxane compound rubber, 20-30 parts of white
carbon black and 3 parts of first polysiloxane by
mass are kneaded for at least 4 h at the temperature of 30-80 DEG C, and base rubber is obtained, wherein first polysiloxane is hydroxyl-terminated polysiloxane with the average molecular weight of 610-1,110; B, the base rubber and 24-60 parts of
magnesium sulfate whiskers or
magnesium borate
whiskers by
mass are kneaded for at least 3 h at the temperature of 30-80 DEG C, and a rubber compound is obtained; C, the rubber compound and 2-5 parts of vulcanizing agent by
mass are mixed on a double-roller
machine, a first mixture is obtained, the first mixture is pressurized and vulcanized for 20 min-30 min in a press vulcanizer at the pressure of 9 MPa-11MPa and the temperature of 165 DEG C-175 DEG C, the pressure is kept for at least 1 h, cooling is conducted, and then the
whisker /
silicone rubber composite is obtained. The
whisker /
silicone rubber composite prepared through the preparation method is further disclosed. The
whiskers serve as
flame retardant of the whisker /
silicone rubber composite, and the advantages of being low in
toxicity, stable, capable of abating
smoke and the like are achieved.