The utility model discloses an assembled multifunctional outer wall body. At present, the assembled outer wall body mainly uses lightweight steel section as a keel and EPS thermal mortar as a thermal interlayer, is mainly used on steel structure buildings and has the problems of poor durability, obvious thermal bridge effect, high construction cost, poor adaptability with reinforced concrete structures and the like. The assembled multifunctional outer wall body disclosed by the utility model is of a frame interlayer composite structure, uses a fine rock reinforced concrete frame as the keel, foam concrete is filled in the grids of the frame and remained with a window hole, and cement fiber panels are fixedly mounted on the inner and outer sides of the fine rock reinforced concrete frame, and are provided with decorative layers. The assembled multifunctional outer wall body is suitable for assembling buildings with integral structures or cast-in-place concrete structures, is firmly spliced with building main structures, has good integrity, integrates functions of protecting, warm keeping, decorating, and waterproofing, and has fast construction speed as all procedures are finished at one step and an outer scaffold does not need to be erected in the mounting process.