The invention provides an anti-aging method for polycarbonate, belonging to the polymer material modification field. The method has the characteristics as follows: compatibility of composite particles and the polycarbonate can be improved, and the anti-aging property of the polycarbonate can be finally improved through adding 1 to 10 portions of polyacrylic ester/TiO2 composite particles into 100 portions of polycarbonate resin with proprietary intellectual property and promoting dispersing of nano TiO2 in the polycarbonate matrix resin by the synergistic effect of the polyacrylic ester and the polycarbonate. After modified polycarbonate is aged in an indoor simulated climate for 800 hours, the tensile-strength and elongation at break of the modified polycarbonate are 67.4 MPa and 44.7 percent respectively, and the conservation rate of the tensile-strength and the conservation rate of the elongation at break of the modified polycarbonate are 104.6 percent and 66.4 percent respectively; while the tensile-strength and the elongation at break of unmodified polycarbonate are 60.8 MPa and 11.8 percent respectively, and the conservation rate of the tensile-strength and the conservation rate of the elongation at break of the unmodified polycarbonate are 92.9 percent and 34.1 percent respectively. After the modified polycarbonate is aged outdoors in Jiangjin, Yuli and Lhasa for 1 year, the tensile-strength and the elongation at break of the modified polycarbonate are higher than the tensile-strength and the elongation at break of the unmodified polycarbonate respectively.