Steven Gerrard sent England up in the lead just 11 minutes into the match with a superb finish from 25 yards out.
Belarus leveled the score when Sitko powered a header past England keeper James.
But then Wayne Rooney showed of his good form for England yet again.
Rooney sent England back into the lead after a good pass from Emile Heskey.
The United striker finished the scoring with his second and England’s third goal in the 74th minute.
England have now won all of their four games so far in their World Cup qualifying group.