The objective of this research was to analyze and identify the pathogens of an outbreak caused by consumption of sweet dumplings made by fermented corn flour in Guangnan County.Methods On the basis of epidemiological investigation, microbiological culture and biochemical analysis was performed on four collected food samples by VITEK 2 COMPACT according to GB/T 4789.29-2003. The suspected isolates were performed 16S rRNA sequence analysis. And the toxin was analyzed by high performance liquid chromatography-mass spectrometry (HPLC-MS).Results Both sequence analysis and biochemical analysis showed that all the three isolates were Burkholderia gladioli. And its toxin, bongkrekic acids, were detected in all samples, the highest toxicity was 9.67 mg/kg.Conclusion B.gladioli was the pathogen of this outbreak caused by fermented corn flour. It was called as Pseudomonas cocovenenans subsp. farinofermentans in China.