Background : Currently, increasing attention is being paid to the important role of in-testinal microbiome in diabetes. However, few studies have evaluated the characteris-tics of gut microbiome in diabetic miniature pigs, despite it being a good model animal for assessing diabetes. Methods : In this study, a mini- pig diabetes model (DM) was established by 9- month high- fat diet (HFD) combined with low- dose streptozotocin, while the animals fed standard chow diet constituted the control group. 16S ribosomal RNA (rRNA) gene sequencing was performed to assess the characteristics of the intestinal microbiome in diabetic mini- pigs. Results : The results showed that microbial structure in diabetic mini- pigs was altered, reflected by increases in levels of Coprococcus_3 and Clostridium_sensu_stricto_1 , which were positively correlated with diabetes, and decreases in levels of the bac-teria Rikenellaceae , Clostridiales_vadinBB60_group , and Bacteroidales_RF16_group , which were inversely correlated with blood glucose and insulin resistance. Moreover, PICRUSt- predicted pathways related to the glycolysis and Entner- Doudoroff super-pathway, enterobactin biosynthesis, and the L - tryptophan biosynthesis were signifi-cantly elevated in the DM group. Conclusion : These results reveal the composition and predictive functions of the in-testinal microbiome in the mini- pig diabetes model, further verifying the relationship between HFD, gut microbiome, and diabetes, and providing novel insights into the application of the mini- pig diabetes model in gut microbiome research.