A man who raped a drunk teenager at a Perth park so violently that she had difficulty walking afterwards has been sentenced to five-and-a-half years in prison.

Fallah George, then aged 20, was drinking alcohol with a group of people, including the 16-year-old victim whom he had just met, at the Perth foreshore in December 2016 when he asked her to walk with him.

The girl was attacked on the Perth CBD foreshore. Credit:Daniel Carson

George then pushed her against a shed and began kissing the girl despite her protests and told her to "chill", the WA District Court heard on Thursday.

The girl realised her friends had gone and tried to leave too, but tripped and spilled the contents of her handbag.