Flexible and stretchable ion-conductive elastomers have shown promising applications in wearable flexible sensor devices, biopotential detection, electroluminescent devices, and other areas. However, the currently employed gel-based ion-conductive materials encounter issues such as solvent volatilization or leakage. Herein, there is an urgent requirement to develop a solid-state ionic conductor material that is both safe and reliable, free from issues of liquid leakage. Here, the study reports a solid-state ion-conductive elastomer with excellent mechanical properties and high ionic conductivity based on a synergistic strategy of multiple interaction forces. The solid-state ion−conductive elastomer exhibits high ionic conductivity (1.42 × 10−4 S cm−1 at 25 °C), superior stretchability (≈1550% elongation) and strength (1.48 MPa). Moreover, the solid-state ion-conductive elastomer exhibits high resilience and possesses excellent self-healing ability. The wearable sensor, prepared based on the solid-state ion-conductive elastomer with excellent comprehensive performance, not only demonstrates high strain sensitivity but also captures high-quality epidermal biopotential signals from the human body in biopotential detection. Additionally, the solid-state ion-conductive elastomer can serve as an electrode in ionic electroluminescent devices for human wearable applications. It is believed that the solid-state ion-conductive elastomer can provide novel opportunities for the advancement of wearable devices and soft ionotronics.