The present invention relates to a polycarbonate resin composition, a method of preparing the same, and a molded article including the same. More particularly, the present invention relates to a polycarbonate resin composition including 20 to 75 % by weight of a polycarbonate (A-1) having a melt index (300 °C, 1.2 kg) of 15 to 25 g/10 min; 5 to 25 % by weight of a polysiloxane-polycarbonate copolymer (B); 5 to 45 % by weight of glass fiber (C); 2 to 12 % by weight of a liquid phosphorus-based flame retardant (D); and 1 to 7 % by weight of a phosphazene compound (E), a method of preparing the polycarbonate resin composition, and a molded article including the polycarbonate resin composition.
According to the present invention, the present invention has an effect of a polycarbonate resin composition having a high recycling rate by including a high content of a post-consumer recycled polycarbonate and having excellent impact resistance, heat resistance, and flame retardancy, a method of preparing the polycarbonate resin composition, and a molded article including the polycarbonate resin composition.