Medical negative pressure exhaust disinfection system

The utility model discloses a medical negative pressure exhaust disinfection system which comprises a disinfection box, a filter groove is formed in the upper surface of the disinfection box, a groove opening of the filter groove is provided with threads and is in threaded connection with a sealing cover plate, and the lower surface of the sealing cover plate is fixedly connected with a disinfection filter screen cylinder. The negative-pressure air suction fan has the beneficial effects that when the negative-pressure air suction fan is used, waste gas can be conveyed into the filter tank through the feeding pipe, then the driving motor can be started to drive the negative-pressure air suction fan blades to rotate, and the negative-pressure air suction fan blades exhaust air from the filter tank through the disinfection filter screen cylinder when rotating; after the air in the filter tank is filtered by the disinfection filter screen cylinder, bacteria and viruses are left by the disinfection filter screen c