The invention relates to a disinfecting cabinet with ultraviolet disinfecting functions, comprising a cabinet shell, an inner shell, a lamp tube radiating ultraviolet waves, a ballast and a lamp tube cover, wherein the ballast is connected with the lamp tube and used for driving the lamp tube; the lamp tube is located in the lamp tube cover; the ballast is arranged at an interlayer position formed between the cabinet shell and the inner shell; a heating device used for heating interlayer gas is also arranged; and an exhaust device is arranged at the position on the cabinet shell close to the ballast. By adopting the disinfecting cabinet with the ultraviolet disinfecting functions, the ambient temperature of the ballast can be kept in the working temperature of the ballast, and further the stable output of radiation intensity of the ultraviolet waves is realized.