The utility model provides a transformer oil gas multicomponent gas spectral analysis appearance, includes spectrum appearance host computer and impurity filtering device, impurity filtering device includes the support, and two volumetric apparatus of shelf location and filter, two volumetric apparatus install respectively in the upper portion and the lower part of filter, and volumetric apparatus and filter are established ties, set up second communicating pipe between impurity filtering device and the spectrum appearance host computer, the second is equipped with the delivery pump on communicating pipe, the upper portion erection bracing seat of support sets up the initial bottle of several on the supporting seat, the flow divider is connected through the management to export of every each inception bottle, and the connection of flow divider is imported, and a mount is all installed to lateral part of every initial bottle, sets up electric push rod on the mount, and the lateral part of every initial bottle sets up masking agent pipe, the tailpiece of the piston rod portion and the cooperation of masking agent inside pipe wall of electric push rod. The utility model discloses at first add the transformer oil sample in initial bottle, according to the measurement needs, to pouring into corresponding masking agent in the initial bottle into to reduce heavy metal ion's influence.