Abstract: The anti-corrosion measures and its shortcomings of conventional cabin sealing equipment are briefly introduced, the causes of dampness, condensation and water intake in the antenna pedestal are analyzed, and the improvement scheme of design source prevention and preventive measures put forward. The structure, working principle and test verification of the improved radome, moisture-proofing pressure-regulating device, inflatable valve, safety valve, leakage detection alarm device are introduced. The necessity of improving the antenna sealing level is illustrated, which provides a new technical design reference for the extra-vehicularsealing equipment with the same problems.