The officers were on their daily transit inspection at the 95th Street station in Bay Ridge on June 19 when a woman suffered a medical episode.
Video shows her falling onto the tracks at about 8:30 a.m.
Cops said a train rolled in minutes later.
One of the officers jumped down to the roadbed and lifted the 25-year-old woman onto the platform as the other officer helped pull her to safety.
She was taken to Lutheran Medical in stable condition.
The NYPD wrote on Twitter: "Watch as strategically deployed @nypd68pct officers who were on their daily transit inspection came to the rescue when a passenger suffered a medical episode and fell onto the tracks minutes before a train rolled into the station."