Due to the high refractive coefficient and poor fluidity of polyester powder coatings，their transparency and leveling property were insufficient. Therefore，during the synthesis of polyester resin，acrylic prepolymers prepared by free radical solution polymerization were introduced，then polyester resin chemical structure and composition werecharacterized using infrared spectrometer and X-ray diffractometer. The effects of amount ofacrylic prepolymer，acid value，viscosity，and glass transition temperature（T_g） on the appearance，transparency，mechanical properties，and storage stability of acrylic modifiedpolyester resin and powder coating were studied. The results showed that acrylic modifiedpolyester resin had been successfully prepared. In the synthesis，10% of an acrylic prepolymer with an acid value of 30 mgKOH/g，a viscosity of approximately 1 720 mPa·s，and T_g of about 45. 6 ℃ was added. The resulting acrylic modified polyester resin coatings exhibited highertransparency and sloping flow compared to conventional polyester resin coatings，along with better water resistance and weathering resistance，while also maintaining mechanical properties and storage stability.