Accused: Lian Bin "Robert" Xie.

Accused: Lian Bin "Robert" Xie. Photo: Danielle Smith

The man accused of murdering five members of a Sydney family as they lay in their beds will face a new trial on August 4, following the emergence of new evidence in the case.

Lian Bin "Robert" Xie, 50, is accused of creeping into the North Epping home of his brother-in-law, Min "Norman" Lin, in the early hours of July 18, 2009, and murdering him and four members of his family. This included Min Lin's sons Terry, 9, and Henry, 12, his wife Lily Lin and his sister-in-law Irene Lin.

Mr Xie had been on trial in the NSW Supreme Court over the murders earlier this year.

But the jury was discharged last month after new evidence emerged which the Judge hearing the matter said "may change the shape and content of the trial in significant ways".

On Monday, Justice Peter Johnson ordered that a new trial begin on August 4.

The trial is estimated to take four months, and will be proceeded by a week-long pre-trial hearing commencing on July 21.