The invention relates to a stabilizer composition for preparing a polycarbonate composition and belongs to the technical field of preparation of polycarbonate. The stabilizer composition consists of astabilizer A and a stabilizer B; the stabilizer A is an antioxidant; the stabilizer B is formed by compounding two molecular chain stabilizers; the antioxidant is a hindered phenol antioxidant; the two molecular chain stabilizers are two phosphorus-containing stabilizers; and the molecular structure features of the phosphorus-containing stabilizers are as follows: the stabilizer composition contains a benzene ring, and the phosphorus and the phenyl are directly connected. The invention aims to overcome the problems in the prior art and provides the stabilizer composition for preparing the polycarbonate composition. The stabilizer composition is applied to preparation of the polycarbonate composition, and the indexes, such as the optical property, the molecular weight and the molecular weight distribution, of the final polycarbonate composition product still can maintain higher level after high-temperature processing is conducted for many times, so that the application requirement on multi-time high-temperature processing is met.