Abstract:The method of national standard was used to detect the occurrence of Cronobacter spp. From food （milk， vegetables， cooked and soy） and further identified the isolation strain. FusA gene was used to analyze the genetic diversity of separated Cronobacter spp.， which can identify species. This paper mainly has made the following conclusions and cognition： ①There are 39 other foods （23 vegetables， 14 cooked food and 2 of soy product） test too， 14 of which detected Cronobacter spp.， in a rate of 35.9 %. Vegetables were detected in 8 （34.8 %）， food products were detected in 4 （28.6 %）， 2 copies of soy products are detected （100.0 %）. ② Based on fusA gene， the genetic diversity was analyzed for 14 Cronobacter spp.， the result indicated that there are 9 C. sakazakii， and 5 C. malonaticus among these isolates.