Polypropylene composite material with good appearance and preparation method thereof

The invention relates to a polypropylene composite material with good appearance and a preparation method thereof. The preparation method comprises the following steps: (1) weighing the following components by weight percent: 33%-85.6% of polypropylene, 3-20% of flexibilizer, 1-20% of ternary polymerization thermoplastic elastomer, 10-30% of filling mineral, 0.2-1% of antioxygen, and 0.2-1% of lubricant; (2) putting the raw materials of the step (1) into a high-speed mixer and mixing for 2-5 minutes, and discharging; (3) putting the materials mixed in the step (2) into a twin screw extruder and pelleting through extrusion so as to prepare the polypropylene composite material with good appearance, wherein the rotation speed of the twin screw extruder is 200-400 rpm (revolutions per minute), and the temperature is 180-220 DEG C. Compared with the prior art, the polypropylene composite material has good mechanical property, has no defects such as marks and tiger skin left on the surface, is environment-friendly, and can be widely used in the fields of automobiles, household appliances, sports goods and the like.