Specimen bag for NOSES operation

The utility model belongs to the technical field of medical instruments, and particularly relates to a specimen bag book for NOSES surgery, which solves the problem that in the process of taking out a specimen, a natural orifice is possibly damaged, or implantation transfer occurs due to the leakage of exfoliated tumor cells caused by the damage of a specimen bag. The utility model discloses a disposable negative pressure bag which comprises a strip-shaped bag body, the bag body comprises two long edges and two short edges, the two short edges of the bag body are respectively provided with an instrument operation end, one of the two long edges is provided with an opening, the opening is connected with a sealing device, the other long edge is provided with a negative pressure pipe, the negative pressure pipe is provided with a negative pressure hole communicated with the inside of the bag body, and the negative pressure hole is communicated with the inside of the bag body. And one end of the negative pressure