A Greenwich Village resident claims cops chased him into his apartment building and threatened to shoot his dog in the mistaken belief that he was a robbery suspect.

Vincent Longo — who was cleared of the robbery rap after five years — says plainclothes cops tried to grab him and then chased him with guns drawn while he was walking home on Bleecker Street with his dog in October 2010, according to his Manhattan federal suit.

Thinking he was being robbed, he fled into his apartment and down a fire escape, then surrendered to other cops, the suit states.