Schools Chancellor Dennis Walcott yesterday blasted a Bronx principal for playing a gun-wielding gangbanger in a bloody B-movie.

“The chancellor is aghast at the images in and content of the film, which are totally inappropriate,’’ a city Department of Education spokeswoman said.

The Post revealed yesterday that Anissa Chalmers, principal of PS 132 in Morrisania, acted in the low-budget flick “Gang Girl,” which features beatings, shootings and rape.

“The chancellor is always concerned about both real and perceived violence and its impact on students,” the spokeswoman said.

Chalmers’ school has seen several recent violent altercations. PS 132 got an overall grade of “D’’ and an “F’’ for “environment,’’ which includes safety.

Chalmers received a waiver to appear in the film, but the DOE didn’t know the film’s content, according to the spokeswoman.