[Objective] To study the effects of Chinese herbal medicine additive on immune function in fattening pigs( Berkshire × Meishan pig). [Method]48 fattening pigs with 40 kg were randomized into control group and 3 experimental groups. Serums were collected on 30,60 and 90 d,respectively for total protein,albumin,Ig G,Ig M and complements C3 levels. Immune organs and tissue section were investigated.[Result]The results showed that total protein level were not significantly difference between the test groups and...