The invention discloses an active in-situ acquisition system for lasting organic pollutants in soil air phase. The active in-situ acquisition system comprises a vacuum pump, a flowmeter, a solid-phase extraction column void column pipe, a surge flask and an air collecting device, wherein the vacuum pump is used for vacuumizing the interior of the system; the flowmeter is used for measuring the flow speed of the air flow in the system; the solid-phase extraction column void column pipe is used for collecting the lasting organic pollutants in a soil air sample; the surge flask is used for buttering the air entering into the system and keeping the air pressure balance in the system; the vacuum pump, the flowmeter, the solid-phase extraction column void column pipe, the surge flask and the air collecting device are successively communicated and connected. The active in-situ acquisition system provided by the invention can reduce the influences of atmospheric air, soil moisture and fine particle solid matters in a sampling process and effectively control the sampling error. Different combinations of multiple products of the active in-situ acquisition system can be used for researching the regional soil air at different levels, profiles and time sequences. The active in-situ acquisition system provided by the invention has the advantages of reasonable device design, simple manufacturing technique, low cost, repeated use, easiness in operation and maintenance, high efficiency, durability and portability.