The work aims to study the effects of common additives on the surface gloss and fog of BOPP (biaxially oriented polypropylene) films. The effects of different types of additives on the optical properties of BOPP film were compared and analyzed by measuring the surface gloss and fog of BOPP films. It was found that hydrogenated petroleum resin had good compatibility with PP and was beneficial to improve the surface gloss and transparency of BOPP films. 5%-20% (mass fraction) hydrogenated petroleum resin could increase the gloss of BOPP film from 88% to 95%, and decrease the fog from 1.7% to 0.8%. The transparency enhancement effect was obvious. Antistatic agents (alkyl diethanolamines, monoglycerides) and slipping agents (silicones, erucic amide) had partial compatibility with PP, and the optical properties of BOPP films were affected to varying degrees during migration. In the antistatic system composed of alkyl diethanolamine and monoglyceride, the addition of alkyl diethanolamine was conducive to improving the optical properties of BOPP films, the increased content of monoglyceride significantly worsened the optical properties of the films, and the addition of erucic amide also caused the gloss of BOPP film to decrease and the fog to increase. Phenyl modified silicone was more advantageous to improve the surface gloss and transparency of BOPP film than ordinary silicone. The interface of anti-blocking agent silicon dioxide and surface PP was produced due to their incompatibility. When the content of silicon dioxide was more than 0.15% (mass fraction), the fog increased rapidly and the gloss decreased. Selection and optimization of additives in film formulation are the keys to develop BOPP films with high surface gloss and low fog.