A man was charged with fatally stabbing his girlfriend inside their Brooklyn home on a tree-lined street Tuesday morning, cops said.

Rubu Zhao, 52, was arrested and charged with murder after a verbal dispute became violent around 8 a.m., the NYPD said. The 48-year-old woman, who has not been identified, was found by officers at the Sunset Park home with a stab wound to her neck and pronounced dead at the scene, according to police.

Police said there was no previous history of violence between the suspect and victim.

One neighbor told The Post he was shocked by the killing and never witnessed previous fighting between the couple who lived in the downstairs apartment. The pair usually went to the casino together, upstairs neighbor Jack Chen said.

“I’m very surprised. I never heard any fighting,” Chen, 45, said. “I just know she has no job and goes to the casino all the time.”

“The police said he cut her,” Chen added.

Zhao was also charged with criminal possession of a weapon, police said.

The woman’s death is the fourth homicide in the NYPD’s 72nd Precinct so far this year, compared to two in the same period in 2021, the NYPD’s data shows.