What a beast!

Cops busted a Harlem man after he was viewed on video brutally beating a pitbull puppy at an East Harlem housing project.

Irving Sanchez, 46, who cops say has numerous drug arrests, is pictured dragging the pooch, named Max, across the elevator floor in the Robert Wagner Houses on First Avenue near East 120th Street before slapping the pup with a leash as he cowers in the corner.

The video, shot about 9 p.m. Sunday, then shows Sanchez repeatedly kicking Max.

Sanchez was charged yesterday with aggravated cruelty to animals.

Max, who wasn’t injured, was taken by the ASPCA.