This study presents a novel method for fabricating self-polled piezoelectric polymer composites, specifically polyvinylidene difluoride/barium titanate (PVDF/BTO) composites, using melt-state energy implantation. The method involves applying dynamic pressure during the fabrication process to induce structural evolution in both PVDF and BTO, resulting in a high piezoelectric coefficient (d33) of ~51.20 pC/N at a low density of ~0.64 g/cm³. The energy implantation process is demonstrated to enhance the β-crystal phase of PVDF and the crystalline structure of BTO, leading to improved piezoelectric properties. The resulting porous material is used as a pressure sensor, showing a high output voltage of ~20.0 V and sensitivity of ~132.87 mV/kPa. Additionally, the material is tested for energy harvesting, achieving a power density of ~58.7 mW/m² for 10 N pressure with long-term durability. This approach not only provides a high-performance, lightweight, and flexible piezoelectric polymer composite but also offers a sustainable and electrical-free fabrication method for piezoelectric materials.This study presents a novel method for fabricating self-polled piezoelectric polymer composites, specifically polyvinylidene difluoride/barium titanate (PVDF/BTO) composites, using melt-state energy implantation. The method involves applying dynamic pressure during the fabrication process to induce structural evolution in both PVDF and BTO, resulting in a high piezoelectric coefficient (d33) of ~51.20 pC/N at a low density of ~0.64 g/cm³. The energy implantation process is demonstrated to enhance the β-crystal phase of PVDF and the crystalline structure of BTO, leading to improved piezoelectric properties. The resulting porous material is used as a pressure sensor, showing a high output voltage of ~20.0 V and sensitivity of ~132.87 mV/kPa. Additionally, the material is tested for energy harvesting, achieving a power density of ~58.7 mW/m² for 10 N pressure with long-term durability. This approach not only provides a high-performance, lightweight, and flexible piezoelectric polymer composite but also offers a sustainable and electrical-free fabrication method for piezoelectric materials.