Millimeter wave radar support wave-absorbing material and preparation method thereof

The invention provides a millimeter-wave radar bracket wave-absorbing material and a preparation method thereof, and relates to the field of millimeter-wave radar wave-absorbing materials. The material comprises the following components in parts by weight: 55-80 parts of polypropylene; 10 to 18 parts of a wave absorbing agent; 5 to 15 parts of glass fiber; 3-10 parts of a toughening agent; 1-5 parts of a compatilizer; 0.2 to 1.5 parts of a lubricant; 0.1 to 0.5 part of an antioxidant; during preparation, the polypropylene, the flexibilizer, the compatilizer, the lubricant, the antioxidant and the wave-absorbing agent subjected to coupling treatment are fully and uniformly mixed in proportion and then are added from a main feeding port of a double-screw extruder, the glass fibers are added from a side feeding port of the double-screw extruder, and the millimeter-wave radar support wave-absorbing material is obtained through melt blending extrusion and cooling granulation. The prepared material is directly subj