One of the students involved in a protest against higher education cuts which targeted Foreign Affairs Minister Julie Bishop has been banned from university amid campus security allegations that police are investigating.

The protest on May 16 at the University of Sydney, in which Ms Bishop was surrounded by chanting students in a crush of bodies that included security guards, was labelled an "assault" by Education Minister Christopher Pyne.

Tom Raue, who was among the student protesters, received a letter on Friday from the head of campus security telling him he was banned from the university for a month – which closely coincides with the time he has left to serve on the student board.

In the letter, Mr Raue was told he was captured on video footage physically forcing his way through security and police officers.