Abstract: [Objective]To assess the effect of Picria fel-tarrae Lour.extracts on the growth performance of piglets and to provide a reference for their better application in animal production.[Method]A total of 250 healthy three-way crossbred pigs(Duroc×Landrace×Yorkshire)aged 28 to 35 days with similar weight were selected and randomly divided into 5 groups(A-E)with 5 replicates per treatment and 10 pigs per replicate.The groups of A,B and C were set as high-,middle-and low-dose Picria fel-tarrae Lour.extracts groups respectively,and fed diet with 3.500,1.750 and 0.875 g/kg Picria fel-tarrae Lour.extracts,respectively.The group D was a positive medicine control group fed a diet containing 4.0 g/kg Qibusan.The group E was set as a blank control group fed basal diet.The pre-feeding period was 7 days and the formal trial period lasted for 30 days.The experimental piglets in each group were weighed before feeding at 7:00 on the 0,15st and 17st day of the experiment,and the feed intake for each group were recorded.At the end of the experiment,the intergroup differences in average daily feed intake(ADFI),average daily gain(ADG)and feed to gain ratio(F/G)were statistically assessed.[Result]The weight,ADG and ADFI of the groups of A,B and C were significantly or extremely significantly elevated compared to the group E(P<0.05 or P<0.01),while the F/G was reduced.The group B(middle-dose group)showed the best performance in increasing the weight,ADG and ADFI of piglets and had extremely significantly lower F/G compared to the groups of D and E(P<0.01).[Conclusion]Picria fel-tarrae Lour.extracts have a certain growth promoting effect on piglets,and their optimal level of dietary supplementation was 1.750 g/kg.