The invention relates to an SBS (styrene butadiene styrene) composite material, in particular to an anti-aging sisal fiber modified SBS composite material, which is characterized by being prepared from the following ingredients in parts by weight: 50 to 70 parts of SBS, 6 to 13 parts of polystyrene, 5 to 10 parts of modified sisal fiber, 2 to 5 parts of ceramic fiber, 0.01 to 0.05 part of spermine-NO, 0.01 to 0.03 part of citric acid, 0.1 to 0.3 part of dioxane, 1 to 3 parts of antioxidants and 0.5 to 1 part of lubricating agents. The invention also provides a preparation method of the SBS composite material. The SBS composite material prepared by the method has the characteristics of excellent anti-aging performance, excellent anti-impact performance and the like.