Hundreds of people have marched on New South Wales Police headquarters protesting about claims of officer violence at Sydney's Gay and Lesbian Mardi Gras.

Protesters made their way from Taylor Square in Darlinghurst to Sydney Police Centre at Surry Hills.

Police estimated that about 1,000 people took part in the march which was organised following .

In one incident a gay rights activist was arrested and claimed he was bashed by police, while in a separate case, and stepping on his back.

Organiser Karl Hand says the Gay and Lesbian community will not tolerate violence by police.

"To get that many people on the street, people are really angry and I think that police will remember tonight," he said.

A NSW police statement said protesters were well behaved and that there had been one arrest after the protest had dispersed.