Prefabricated external wall panel

The utility model relates to the technical field of prefabricated building parts, and discloses a prefabricated external wall panel which comprises a composite carbon fiber keel, the composite carbon fiber keel comprises a framework, the framework is of a crossed structure with a plurality of spacing cavities, and a plurality of sound insulation parts are arranged in the spacing cavities to form a plurality of sound insulation parts; the number of the plate bodies is two, and the two plate bodies are arranged on the two sides of the composite carbon fiber keel respectively; and the connecting part is used for connecting the two external wall panels. According to the scheme, the overall mass of the external wall panel can be reduced under the condition that the overall structural strength of the external wall panel is guaranteed, and the possibility that the external wall panel is stripped and falls off due to overlarge mass is reduced. The technical problem that an existing prefabricated outer wall body can b