Sampling device for air pollution

The utility model discloses a sampling device for air pollution. The device comprises a cavity, a push rod and an air inlet pipe, an air chamber is arranged in the cavity; a piston ring is arranged atone end, extending to the air chamber, of the push rod; a sliding groove is formed in one end of the air chamber. The air inlet pipe is connected with the sliding groove in a sliding mode. A filter screen is arranged in the air inlet pipe; a ventilation pipe is arranged in the sliding groove; one end of the breather pipe is communicated with the air chamber, and the other end of the breather pipeis communicated with the air inlet pipe; a gas storage box is arranged at the bottom end of the cavity, a telescopic hose is arranged in the gas storage box, a threaded head is arranged at one end ofthe telescopic hose, a supporting frame is arranged on one side of the cavity, and the telescopic hose penetrates through the supporting frame and is in threaded connection with the ventilation pipethrough the threaded head. T