High-grade biosafety laboratory drainage breather pipe filter

The utility model provides a drainage breather pipe filter for a high-grade biosafety laboratory. The drainage breather pipe filter comprises a barrel, a biosafety airtight valve, an efficient filter element module, a UV sterilization module, an in-situ disinfection module and an MPPS leak detection module, the biological safety airtight valves are fixedly mounted at the upper end and the lower end of the barrel respectively; the efficient filter element module is mounted in the barrel; the UV sterilization module is fixed in the cylinder body and is positioned on one side of an outlet of the high-efficiency filter element module; a circulating channel is formed between the in-situ disinfection module and the interior of the barrel; the MPPS leak detection module is arranged on one side of the cylinder and used for scanning a probe of the leak detection device to sample aerosol. The filter provided by the utility model has the characteristics of high filtering efficiency on pathogenic microorganisms in the dr