Abstract: 120 Heilongjing Zi geese were divided into three groups randomly （control and test Ⅰ , Ⅱ groups）, every group has forty. The control group was fed with base feed, the group Ⅰ and Ⅱ were appended 1.5,1.0 mL/ kg microecological products daily for 90 d in base feed. The result indicated： Compared with the control, the number of lactobacillus af caecum in the experiments Ⅰ , Ⅱ were all more （P〈0.05）, the number of colibacillus and salmonella were all much fewer （P〈0.05）. The daily consuming of feed and fresh proportion of the experiment groups had significant difference compared with the control （P〈0.05）. The experiment showed that the microecological products had the function of regulating the important flora with impact on caecum, and increased the immune function and growth performance.