An automatic cigarette-lighting purifier includes a cigarette holding chamber and a smoke purification device, one end of the cigarette holding is provided with a chamber opening which is communicated with the smoke purification device and the cigarette holding chamber, and a cigarette positioning member is provided at the chamber opening. The automatic cigarette-lighting purifier further includes a ventilation end cap that is movable to cover the end of the cigarette holding chamber that is opposite to the chamber opening, and a cigarette-lighting member is at one side of the ventilation end cap. A cigarette can be lighted automatically by the cigarette-lighting device once it's placed in the purifier, and the burned cigarette is always kept in the purifier, thus no unfiltered second-hand smoke is produced. Furthermore, the structure of the automatic cigarette-lighting purifier is simple, the operation is convenient, and the possibilities of scalding and cigarette ash falling are prevented.