Abstract:A total of 60 weaned piglets with an average weight of 18 kg were randomly divided into 2 treatments,with 3 replicates per treatment and 10 pigs per replicate.The control group was fed with basal diet supplemented with antibiotics and the experimental group was fed with 20% fermented feed without antibiotic for 154 days,to study the effects of complex probiotics fermented feed without antibiotic on growth performance,blood parameters,immune index and meat quality in growing-finishing pigs.The results showed that the performance of the experimental group fed with 20% fermented feed without antibiotic was better than the control group.Compared with the control group,the average daily feed intake increased by 5.86%,average daily gain increased by 10.89% and feed conversion ratio decreased by 4.38% (P＜0.05) in the experimental group.The content of serum aspartate aminotransferase,serum urea,serum albumin and ration of albumin with globulin in the experimental group were significantly lower (P＜0.05),while the content of serum alkaline phosphatase,glucose,globulin and IgG in the experimental group were significantly higher than that of the control group (P＜0.05).In addition,the slaughtered pork 45 min pH,2 h pH,the red value (a*) and intramuscular fat of the experimental group were significantly higher (P＜0.05),while the value of slaughtered pork drip loss and shear force of the experimental group were significantly lower than that of the control group (P＜0.05).In conclusion,the fermented feed without antibiotic can improve the production performance,enhance immunity and improve meat quality in growing-finishing pigs.