A lightweight whole-spacecraft vibration isolation system with broadband vibration attenuation capability is of great significance to the protection of satellites during the launch phase. The emergence of metamaterials/phononic crystals provides new ideas for the design of such isolation systems. This letter reports a new type of satellite isolation system to isolate shock and vibrations in an ultrawide frequency range. The labyrinth design of this system integrates acoustic black holes (ABHs) as microstructures, which leads to a significant impedance mismatch and enhances the bandgap effect. The ultrawide vibration and shock attenuation ability of the proposed design is confirmed through band structure and transmission analyses as well as the hammer and falling tests, showing the potential for vast isolation applications.