Biological safety cabinet disinfected by ultraviolet rays and ozone

The utility model belongs to the technical field of biosafety cabinets, and particularly relates to a biosafety cabinet disinfected by ultraviolet rays and ozone. The biosafety cabinet comprises a biosafety cabinet body, and an ozone-free type ultraviolet lamp and an ozone type ultraviolet lamp are arranged in a working area of the biosafety cabinet body; the top of an air box of the biological safety cabinet body is communicated with a double-exhaust-outlet type exhaust valve, the double-exhaust-outlet type exhaust valve comprises a first exhaust section and a second exhaust section which are communicated with each other, a first air valve used for controlling the first exhaust section to be switched on and off is arranged in the first exhaust section, and a second air valve used for controlling the second exhaust section to be switched on and off is arranged in the second exhaust section; an ozone filter used for filtering ozone in air flow is arranged at an air outlet of the second exhaust section. The ozo