Background: Type 2 diabetes (T2DM) is a top risk factor for health in China. Gut microbiota, genetic factors and lipids metabolism play important role in development of T2DM. In this study, we investigated the relationship between the gut microbiota and omentin-1 gene polymorphism to explore host gene and gut microbiota interaction in Uyghur T2DM.Methods: A total of 98 newly diagnosed Uyghur T2DM patients and 99 healthy normal controls (NC) enrolled into this study according to inclusion criteria. The total DNAs were extracted from the fecal microbiota. Abundant of the Lactobacillus genus, Bacteroides thetaiotaomicron and Clostridium in the gut microbiota were determined with 16S rDNA gene Real-time fluorescence quantitative PCR amplification. PCR-PFLP was applied to determine the genotypes of Val109Asp variant (rs2274907) in the Omentin-1 gene. And the relationship between rs2274907 and gut microbiota was assessed.Results : There were no significant differences between the genotypes of Val109Asp variant (rs2274907) of T2DM and control group. The abundances of Lactobacillus genus and Clostridium genus were lower in newly diagnosed T2DM group, compared with NC group ( P <0.05). Serum insulin, LDL-C, the abundances of Lactobacillus genus and Clostridium genus were the risk factor of T2DM. (OR=1.094 95%CI 1.014-1.180), (OR=3.868 95%CI 1.250-11.971), (OR=0.288, 95%CI 0.145-0.571), (OR=0.044, 95%CI 0.012-0.154).Conclusions: The abundance of Lactobacillus and Clostridium genus may be related to the pathogenesis of new-onset T2DM in Uyghur population, the mechanism of which needs to be further studied. The interaction relationship between the gut microbiota and omentin-1 gene polymorphism in newly diagnosed T2DM was not observed in this study.