The removal capacity of nitrogen and phosphorus by Ipomoea aquatica Forsk planted on artificial floating beds were emphatically studied,and the microflora structure in the yellow catfish (Pseudobagrus fulvidraco) intestine were analyzed by using high-through sequencing technique.The results showed that ammonia nitrogen,total nitrogen and total phosphorus can be removed by the I. aquatica Forsk planted on artificial floating beds,with high removal efficiency.There were some differences in the intestinal bacteria diversity between the experimental (with artificial floating beds) and control (without artificial floating beds) groups.But the bacterial composition of different groups did not significantly vary from each other,and the predominant species were similar in all groups.At the beginning period,Proteobacteria was dominant (88.56%) in the yellow catfish intestine,and at the ending period,the dominant bacterial community in the control group were Firmicutes (48.4%),Fusobacteria (32.52%) and Proteobacteria (14.56%),whereas in the experimental group,the core microbiota composed of Proteobacteria (36.72%),Firmicutes (21.89%),Fusobacteria (17.48%) and Bacteroidetes (11.48%).This study provided a more comprehensive understanding that I. aquatica Forsk planted on artificial floating beds can change the flora structure of the yellow catfish intestine.