Flame-retardant polycarbonate reinforced high-modulus molding composition and preparation method therefor

Provided are a flame-retardant polycarbonate reinforced high-modulus molding composition and a preparation method therefor. The flame-retardant polycarbonate reinforced high-modulus molding composition of the present invention comprises a polycarbonate or/and a polyester carbonate, a glass fibre, an impact modifier, a flame retardant, a polyalkylacrylate and an additive, and is characterized in that the polycarbonate and/or polyester carbonate is 40-90 parts by weight, the glass fibre is 5-50 parts by weight, the impact modifier is 1-20 parts by weight, the flame retardant comprises 1-20 parts by weight of a phosphorus-containing flame retardant and 0.1-5 parts by weight of a fluorohydrocarbon resin, the polyalkylacrylate is 1-20 parts by weight, and the additive comprises at least 0.1 parts by weight of an antioxidant. In the present invention, a phosphorus-based flame retardant is used in combination with a cocoon-type or flat glass fibre and a polyalkylacrylate with a high molecular weight, and the flame-retardant polycarbonate reinforced molding material having an excellent appearance and mechanical properties can be obtained.