The invention provides a separating-type underground excavated double-deck metro station, and relates to the technical field of metro stations. Equipment areas are arranged at the two ends of both a first underground excavated double-deck tunnel and a second underground excavated double-deck tunnel; the first underground excavated double-deck tunnel communicates with the second underground excavated double-deck tunnel through a communicating channel, and entrance and exit passageways are arranged on the outer sides of the upper part of both the first underground excavated double-deck tunnel and the second underground excavated double-deck tunnel; the inner parts of both the first underground excavated double-deck tunnel and the second underground excavated double-deck tunnel are divided into and arranged as double-deck spaces through center spacers; the upper space of each double-deck space is provided with a station hall, a platform and an escalator, and the lower space of each double-deck space is provided with a heat discharging air duct; and a first line is arranged on one side of the heat discharging air duct in the first underground excavated double-deck tunnel, and a secondline is arranged on one side of the heat discharging air duct in the second underground excavated double-deck tunnel. According to the separating-type underground excavated double-deck metro station,the function of a station craft box can be effectively met, meanwhile, an underground excavated section is reduced, the construction risk is reduced, moving and changing of pipelines can be reduced, traffic reconciliation is optimized, and practicability is higher.