Superfine anhydrite powder modified plastic and preparation method thereof

The invention discloses a superfine anhydrite powder modified plastic and a preparation method thereof, and belongs to the technical field of high polymer materials, the superfine anhydrite powder modified plastic comprises the following raw materials by weight: 60-80 parts of polyolefin resin, 20-25 parts of modified superfine anhydrite powder, 3-5 parts of a lubricant, and 1-2 parts of an antioxidant; the preparation method of the superfine anhydrite powder modified plastic comprises the following steps: adding polyolefin resin, modified superfine anhydrite powder, a lubricant and an antioxidant into a mixer, mixing for 20-30 minutes at the rotating speed of 200-300r/min to obtain a mixture, then transferring the mixture into a double-screw extruder at the temperature of 180-220 DEG C for melt blending, extruding, cooling and pelletizing to obtain the superfine anhydrite powder modified plastic. The superfine anhydrite powder modified plastic is obtained; the prepared modified superfine anhydrite powder can