Abstract: A feeding experiment with 32 growing-finishing pigs was conducted to study the effects of biogas slurry added to the ration at different rates on pig’s weight gain, feed imake, feed utilization, health and pork quality. The results showed that the rates oi pig"s body weight gain and feed utilization were increased by 20. 6% and 17% respectively by adding the biogas slurry (air dry weight) at 1. 5 times as much as the ration, when the ration contained 10% gross protein and digestible energy value of 12. 1 MJ/ kg.