Airflow collecting bag with anti-reversing function

The utility model discloses an airflow collecting bag with an anti-reversing function, which comprises a bag body, an air inlet device and an air outlet device are respectively and fixedly arranged on the outer wall of the bag body, an interlayer is fixed inside the bag body, the air inlet device and the air outlet device are the same in structure, the air inlet device comprises an air inlet nozzle, a spring groove is arranged on the inner wall of the bottom of the air inlet nozzle, and the spring groove is communicated with the air inlet nozzle. A first spring is fixed in the spring groove, the top end of the first spring is fixedly connected with an air blocking plate, the air blocking plate is inserted into the air inlet nozzle in a sliding mode, first air holes are formed in the bottoms of the outer walls of the two sides of the air blocking plate, a clamping groove is formed in the inner wall of one side of the air inlet nozzle, and the upper portions of the two sides of the air blocking plate are clampe