Influences of the type,content and length of the short fibers on the fiber orientation, fiber dispersion,mechanical properties,heat resistance and swelling properties of the short fiber/CR composites were studied.The results showed that the composites had obvious anisotropy.The orientation degree,tensile strength,tear strength and swelling resistance of 3mm short fiber/CR composites were all better than that of 1mm short fiber/CR composites.The short fiber dispersion had a little effect on the heat resistan...