The incident was reported about 8:40 AM at the station located in posh Connaught Place area.
The victim, identified as Amit Talwar (34), was standing at the edge of a platform at the station when the train bound for Jahangirpuri hit him following which he fell on the tracks.
"He died on the spot," a senior official said. He was rushed to the hospital at the Lady Hardinge Medical
College nearby where doctors declared him "brought dead".
Talwar was a resident of Saket area in south Delhi and police has registered a case in this connection.
Officials said metro services were disrupted for a few minutes.