Sugar beet(Beta vulgaris L.) is an important sugar crop in the world,but its yield and quality are attacked severely by many diseases.Ribosome inactivation protein(RIPs) is a kind of protein which could inhibition the development and increase of pathogenic bacteria,which have broad spectrum resistance to fungi,bacterial and virus.In paper,brown spot resistance and physiological characters of the first generation of transgenic sugar beet with RIP gene have been researched.The result showed that the RIP gene can improve the resistance to brown spot of sugar beet,moreover,there are no negative effects in growth and physiological metabolizing after translating RIP to sugar beet.T