Online enrichment treatment system

The utility model relates to the technical field of pollutant detection, and provides an online enrichment treatment system which comprises two pump bodies, a first six-way valve, a second six-way valve and an enrichment column, the first six-way valve is in fluid communication with the second six-way valve, one pump body is in fluid communication with the first six-way valve, the other pump body is in fluid communication with the second six-way valve, and the inlet end and the outlet end of the enrichment column are both in fluid communication with the second six-way valve; a quantitative loop is arranged between two interfaces of the first six-way valve, the first six-way valve is switched to a first state, the second six-way valve is correspondingly located at a first position, and a sample is fed to the quantitative loop; the first six-way valve is switched to a second state, the second six-way valve is correspondingly located at a second position, and a pump body conveys a mobile phase to wash the quanti