[Aim] In order to examine the interaction between endophytic bacteria and citrus psyllids and screen for potential symbiotic control candidate bacteria, the citrus psyllids endophytic bacteria were isolated and identified in Guangdong and Guangxi, and the diversity of cultivars that can be cultivated in citrus psyllids was determined. [Method] The endophytic bacteria of citrus psyllids were isolated with the method of insect crushing and flat coating. The 16S rDNA sequences of the strains were analyzed with BLAST online, the species of endophytic bacteria were identified, and the phylogenetic tree and venn diagram of the dominant flora were constructed. [Result] A total of 114 endophytic bacteria were obtained, which were classified into 15 genera and 3 phyla. Among them, 59 strains of Bacillus were classified as the dominant flora, accounting for 51.75% of the total isolated bacteria; 14 strains (12.28% of the total number of isolated bacteria) were from Pseudomonas genus and 10 strains of Pantoea accounted for 8.77% of total number of isolated bacteria. Other bacteria accounted for 27.19% of the total number of isolated bacteria. [Conclusion] Bacillus bacteria are widely distributed in citrus psyllids, and they are worth considering as a potential candidate for the symbiotic control of citrus psyllids.