The invention discloses a high temperature-resistant paintable polycarbonate composition and a preparation method thereof. The polycarbonate composition uses specific high temperature-resistant resinand a compatilizer for cooperative use with polycarbonate, wherein and the specific high temperature-resistant resin greatly improves the heat-resistant temperature of polycarbonate, so that polycarbonate can be applied to the field of with ultrahigh heat-resistant requirements; and by combining the use of the specific compatilizer, the solvent resistance of polycarbonate is also greatly improved,at the same time, the specific compatilizer also improves the situation of paint adhesion deterioration caused by high temperature-resistant resin while maintaining the toughness of the material. Thepolycarbonate composition disclosed by the invention is particularly suitable for the field of industrial switches or electronic appliances needing contact with strong polarity chemical reagents and/or solvents and the like or needing paint spraying and heat resistance.