The invention discloses a full automatic liquid level tracing gas purging concentrator, comprising a gas regulation system, a solution constant volume locating device and a precision temperature control and constant temperature device, wherein the gas regulation system comprises a gas blowpipe used for blowing gas, and the end part of the gas blowpipe is provided with an elbow that leads the blowngas to remain a tilt angle with the liquid surface. By adopting the gas blowpipe with the elbow, the concentrator leads the blown gas to remain a certain angle with the liquid surface of a sample, thus realizing the eddy purge of the liquid surface of the sample and improving the volatile efficiency of the sample.