To meet the airworthiness certification requirements for hail ingestion tests of aircraft engines and address the scarcity of research on multi-hail simultaneous ejection devices in China, a single-chamber multi-barrel hail ejection device was designed. The influence of the device′s structural parameters on the hail ejection process was analyzed through simulation, and experimental verification was carried out. The results show that the device enables simultaneous ejection of multiple hailstones with a speed error ≤±1.5%, position dispersion ≤±5 mm, and synchronization time ≤35 ms, all of which comply with airworthiness regulations such as CCAR33.78, and the device also features stable performance and good repeatability. This study provides key equipment support for aircraft engine hail ingestion tests and validates the effectiveness of the single-chamber multi-barrel design in ensuring synchronization and accuracy control.