A man who shot at a police officer during a Sydney drugs raid will have his seven-year prison sentence appealed by the Director of Public Prosecutions.

Philip Nguyen, 57, pleaded guilty to manslaughter and to wounding Constable Bill Crews with intent to cause grievous bodily harm.

He was sentenced earlier this month to a minimum term of seven years and a maximum of nine-and-a-half for the shooting death of the trainee detective in a basement carpark in Bankstown on September 8, 2010.

The officer's family was distressed by the short length of the sentence, prompting Attorney-General Greg Smith to ask the Director of Public Prosecutions to examine it and consider whether an appeal should be lodged.

In a statement on Thursday, a spokeswoman for Mr Smith said he had been informed the DPP has decided to push ahead with an appeal.

"As this matter is now again before the court it is not appropriate to comment further," the statement said.