The NYPD says if city transit pervs are convicted of subway crimes twice, it’s enough to get them banned from the MTA for life, The Post has learned.

With subway sex abuse arrests up in the Big Apple so far this year compared to the same period in 2018 — and more than one-third involving suspects already busted for such crimes — the department is trying to ride the recent wave of support for lifetime bans.

Gov. Andrew Cuomo officially came out for the bans last week — and supports a two-strikes-you’re-out ban, a governor’s rep said Tuesday.

“They’re highly recidivist, all of them,’’ NYPD Chief of Detectives Dermot Shea told The Post of the serial sickos. “They get over and over arrested for the same things. They ride the same train lines.

“As soon as our transit cops see them, they know them, and they wind up playing a cat-and-mouse game … and follow these people for hours, unfortunately having to wait and watch them commit another crime. It’s extremely frustrating.’’

While the chief admitted that a lifetime ban “is not easy to enforce,’’ he said, “Sometimes, you gotta roll your sleeves up, go into court and fight for what you think is right.’’

Police brass identified for The Post three slimy straphangers who they say would be among the first targeted by them for potential lifetime bans.

The convicted pervs include 41-year-old Barron Jones of Queens, who has been arrested at least 15 times — including for groping women’s butts and grinding against female straphangers, law enforcement sources said.

Another Queens sicko, Miguel Hermengildo Pacheco, also 41, was accused of grabbing a woman’s bottom as she walked her three kids to school.

One of the pervs, Pedro Sanchez-Rojas, 51, has also allegedly used a camera now twice to film up female subway riders’ skirts.

“These bad actors are indicative of the larger problem of recidivist transit sexual offenders who use the trains solely for a hunting ground — and why we need swift action to protect riders,” said NYPD spokeswoman Devora Kaye.

There have been 624 subway sex-related complaints so far this year in the city compared to 609 for the same period last year, figures show.

There also have been 275 subway sex crime arrests year-to-date compared to 270 for the same time frame in 2018, the stats say. In 95 of the arrests, the perp had already been collared for a subway sex crime, cops said.

Shea said police would enforce lifetime bans hopefully with the help of ankle bracelets that would alert cops if the pervs enter the system.

Besides, “as soon as our transit cops see them, they know them,” Shea said of the perverts.

He said banned offenders would be prosecuted for trespassing, adding that the move to ban serial offenders would likely need state legislative action.

MTA Chairman Pat Foye, hand-picked by Cuomo, has already said he would support such legislation.