Air sample collecting device

The utility model discloses an air sample collecting device, which relates to the technical field of air collection and comprises a mounting mechanism and a collecting mechanism. The mounting mechanism comprises a mounting cylinder, a rotating disc is rotationally arranged in the middle of the mounting cylinder, and a mounting rod is arranged on one side of the top end of the rotating disc; the collecting mechanism comprises a mounting box, a box cover is arranged at the top end of the mounting box and connected with the mounting box through mounting screws, the box cover is connected with the end of the mounting rod, and an exhaust fan is arranged in the mounting box; the device has the beneficial effects that the rotating disc is rotationally connected with the mounting cylinder, so that the collecting direction of the collecting pipe can be conveniently adjusted, and the rotating disc can be automatically driven to rotate through the driving motor; the collecting barrel in threaded connection is used for c