Abstract: Pseudomonas, one of the most harmful psychrotroph in raw milk, can easily grow to be dominant microflora in the refrigerated conditions. Most of the psychrotrophilic Pseudomonas secrete the protease and lipase, resulting in milk metamorphism.The article sumerized the advance on the hazard characteristics, rapid detection methods and the new control techonology of Pseudomonas. At last, the research direction of psychrotrophilic Pseudomonas was discussed.