Multi-chromatographic column testing device based on gas chromatograph

The utility model belongs to the technical field of chromatographic column testing, and particularly relates to a multi-chromatographic column testing device based on a gas chromatograph, which is used for continuous testing of a plurality of chromatographic columns and comprises a column box, gas inlet joints of the plurality of chromatographic columns are mounted on the front side of the top surface in the heat preservation cotton box body side by side, and gas outlet joints of the plurality of chromatographic columns are mounted on the rear side of the top surface in the heat preservation cotton box body side by side; a group of multi-way gas row electromagnetic valves are arranged at the top of the column box, the group of multi-way gas row electromagnetic valves comprise a plurality of electromagnetic valves, gas outlets of the plurality of electromagnetic valves are connected with gas inlet joints of a plurality of sets of chromatographic columns in a one-to-one correspondence manner, and gas inlets of