In this study,120 healthy grower pigs weighing about 25kg were randomly divided into 3groups with 4 replicates of 10 animals each,to investigate the influence of the low protein diets withdifferent protein levels on the growth performance and the profit.Group A,the control,were fed withthe diet of NRC protein level,Group B and C fed diets with their protein content 2% and 3% lowerrespectively than the control.The experiment period was 30 days.The pigs were weighed and the feedconsumed calculated.The result show that there were no significant differences of the average finalbody weights,the average daily加ns,the feed consumption and the feed/gain ratios,among the 3groups ( p>0.05).The feed cost of Group B is much less than that of Group A.The feed cost ofGroup C is the least.So suitable decrease in dietary protein level in finisher ration can keen thegrowth performance,reduce the feed cost and increase the profit.