The invention discloses a highly-toughened bulk molding composition which is obtained by polymerization of the following raw materials by weight: 60-80 parts of unsaturated resin, 10-40 parts of low shrinkage agents, 1-2 parts of curing agents, 2-5 parts of mold release agents, 4-20 parts of toughening agents, 30-80 parts of whiskers, 2-5 parts of coupling agents, 100-250 parts of filling materials, 50-150 parts of glass fibers. The invention adopts end active group liquid rubber and whiskers to toughen the BMC material. The toughness of the BMC material is increased by end vinyl liquid butadiene-acrylonitrile rubber; the strength of the BMC material is increased by calcium carbonate whiskers treated by the active end styrene coupling agent; and the trend of the decrease of the strength of the material due to the addition of the liquid rubber is counteracted. Therefore, the highly-toughened BMC material is obtained without the decrease of the strength.