A cop shot a machete-wielding man in a Queens home with a 3-year-old boy inside, authorities said Monday.

The shooting occurred in the home at Broadway and 33rd Street in Astoria around 10 a.m. after a woman called 911 and said her son’s father had a machete and was saying he wanted to die, according to police and law-enforcement sources.

The crying woman later told officers that her toddler son watched as officers “shot my son’s father twice in front of him,” according to video tweeted by a 1010 Wins radio reporter.

“The female 911 caller said she had repeatedly asked the man, the father of their child, to leave the apartment and that he refused to do so,” NYPD Chief of Department Kenneth Corey said at a press conference.

The woman also said the 27-year-old man had taken a lot of pills, was saying he wanted to die and was holding a machete in his hand, police said. The woman, child and the tot’s grandmother were in the home at the time, cops said.

Four uniformed officers responded to the scene and were told the man was still armed with the machete, cops said.

“The male confronted them in a narrow hallway holding the 911 caller’s mother,” Corey said.

Cops eventually got at least the grandmother out of the apartment and deployed a Taser at the man, but it had no effect, Corey said.

“One officer then discharged three shots, striking the man in the groin area,” he said.

The wounded suspect was taken to Elmhurst Hospital in stable condition and undergoing surgery, police said. No officers were injured.

The suspect, who hadn’t been charged as of late afternoon, had four prior busts for resisting arrests, sources said.

In the video shot later at the scene, the girlfriend can be heard telling cops that she shouldn’t be punished for the incident, claiming she’s been threatened with child-services taking away her son.

“They’re trying to take my kid away because I called the police over an argument,” the woman said, crying.

Additional reporting by Tina Moore