Facing the global environmental protection wave, the skeleton production of fat sex dolls is undergoing a green transformation. The full body sex doll support system developed by a certain enterprise uses precious metal alloys extracted from recycled mobile phone motherboards and is combined with corn starch-based bioplastic injection molding. After the fat sex doll is retired, this material can be completely degraded through a special solution, and the skeleton metal recovery rate reaches 97%. A more innovative solution is to use 4D printing technology to allow the skeleton of the fat sex doll to expand intelligently as the child grows - through heat-activated memory materials, the support structure can expand 5 cm per year, extending the service life of the full body sex doll from 3 years to 10 years. This sustainable design concept is reshaping the value standard of the fat sex doll industry chain.