The invention relates to the technical field of aerostats, and discloses an
aerostat with a double-cabin structure. The
aerostat comprises a
buoyancy cabin, a pressure-bearing cabin and a connecting structure, wherein the
buoyancy cabin and the pressure-bearing cabin are respectively formed by mutually independent bag bodies and have no shared wall surface. The
buoyancy cabin is used for containing
lifting gas, a bag body of the buoyancy cabin comprises a gas
blocking layer, and the gas
blocking layer is made of an EVOH
composite film. The pressure-bearing cabin is of a pressure-resistant structure and used for containing air, a bag body of the pressure-bearing cabin comprises a force-bearing layer, the force-bearing layer is made of UHMWPE fabric, and the pressure-bearing cabin can bear gauge pressure not lower than 5 kPa. Different materials are adopted to form the bag body structures of the buoyancy cabin and the pressure-bearing cabin respectively, the pressure-
bearing capacity of the pressure-bearing cabin is improved while the airtight performance of the buoyancy cabin is guaranteed, therefore, effective adjustment of the overall density of the
aerostat is achieved under the condition of the small size, and the aerostat has the advantages of being simple in structure and low in cost.