The invention discloses a polyurethane elastomer composition for an automobile slip pad, which has a double-component system and consists of two components, namely prepolymer and polymer, wherein the prepolymer with 7 to 14 percent of isocyanato is prepared by reacting diphenylmethane diisocyanate with polyoxypropylene polyol at the temperature of between 70 and 90 DEG C; and the polymer is prepared from poly-polyoxypropylene polyol, a catalyst and an antiaging agent. The polymer is mixed with the prepolymer according to a ratio of 100-20 to 100-35 to form a product with Shore hardness of 0 to 20. The polyurethane elastomer composition is mainly used for manufacturing insoles, automobile slip pads, bicycle saddles, handicapped wheelchair saddles and other health-care protective articles, and the obtained products are environment-friendly and safe, and have good processability and comfortable handfeel.