Disclosed are a corona discharge assembly, an ion mobility spectrometer and a corona discharge method. The corona discharge assembly comprises at least one corona discharge unit (1), wherein the corona discharge unit (1) comprises a pair of corona metal wires (11, 12) disposed in parallel, and pulses having the same amplitude and opposite polarities are applied to the corona metal wires (11) and (12) disposed in parallel. The corona discharge assembly can produce more reaction ions than needle or point corona, is helpful to improve the sensitivity of ion migration, and can increase the service life of a corona source at the same time, and the service life can be prolonged by three to ten years.
