Abstract: In order to study the effects of feeding three kinds of feed including puffing pellet feed,self-made soft pellet feed and forzen trash fish on the growth rate, feed efficiency and immunity of largemouth bass.The 360 tails of largemouth bass with and average weight of 86.3 g·prawn^-1 were randomly divided into three groups,which were respectively treated with puffing pellet feed,self-made soft pellet feed,and forzen trash fish,and two replicates were set for each group(the median was treated as the third replicate).The culturing period lasted for 60 days.The results that largemouth bass treated with forzen frash fish had the fastest growth rate,followed by treated with self-made soft pellet feed,and largemouth bass treated with puffing pellet feed had the slowest growth rate.The feed coefficients of treated with forzen frash fish and self-made soft pellet feed were the lower,and the protein efficiency of treated with self-made soft pellet feed was the highest.Compared with the puffing pellet feed,the non-specific immune function of largemouth bass could be improved by the forzen trash fish and self-made soft pellet feed.The activity of alkaline phosphatase and total superoxide dismutase were significantly higher than that of puffing pellet feed (P<0.05). Based on the comprehensive analysis of the factors such as growth index, feed coefficient and immunity, the feeding effct of self-made soft pellet feed breeding on largemouth bass was similar to that of frozen trash fish, it was a better compound feed for largemouth bass.