Capacitive pressure sensors are notable for their simple structure and stability, but they face challenges when stretched, as the thickness of the insulating layer decreases and electrode area increases, complicating the distinction between strain and pressure signals. To solve this, our group developed a substrate using antisolvent techniques to agglomerate high dielectric constant nanoparticles into microscale spheres within a dielectric elastomer matrix. This results in a dielectric elastomer whose dielectric constant decreases as the nanoparticle clusters compress into ellipsoids when stretched. Our strain-insensitive pressure sensor with tunable dielectric properties advances capacitive pressure sensors by solving these challenges and enhancing practicality. This innovation supports the integration of these sensors into wearable devices, intelligent robotics, and other advanced applications.