The invention discloses a polypropylene composite material which comprises 100 parts of polypropylene resin, 14 parts to 30 parts of super fine calcium carbonate filler with 6000 meshes to 7000 meshesand 7 parts to 15 parts of materials for elastic body. The surface treatment is carried out on the super fine calcium carbonate filler after the surface coupling treatment of the stearinic acid. Thenthe polypropylene resin, materials for the elastic body and the super fine calcium carbonate filler are directly put into a high-speed mixer for primary mixing, are mixed evenly at room temperature,and then is moved into a twin-screw extruding machine for even mixing and granulating. Compared with the prior art, the cost of the modified composite material filled by polypropylene equals to the cost of original polypropylene resin. In the invention, the enforcing conditions of the process is ordinary while the modified composite materials is on a par with the popypropylene resin before modification in rigidity and room-temperature impulse strength and low-temperature impulse strength are obviously improved.