Combination instrument waste gas purification device

The utility model discloses a waste gas purification device for a liquid chromatograph-mass spectrometer, which belongs to the technical field of waste gas purification and comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with the liquid chromatograph-mass spectrometer, and a gas outlet of the liquid chromatograph-mass spectrometer is fixedly connected with a first gas guide tube. By arranging the condensation chamber, the first reaction chamber, the second reaction chamber, the waste liquid treatment chamber and the gas filtering assembly, waste gas generated by the combination instrument firstly enters the condensation chamber to be subjected to condensation treatment, and waste liquid obtained after the waste gas is condensed flows into the waste liquid treatment chamber to be subjected to chemical reaction; the condensed waste gas sequentially enters the first reaction chamber and the second reaction chamber for chemical reaction, the gas treated by the second reaction