Anti-oxidation protection case for electrode of gas analysis instrument

The utility model relates to an environmental gas analysis instrument in the petrochemical industry, in particular to an anti-oxidation protection case for an electrode of a gas analysis instrument. The anti-oxidation protection case comprises a case body and a case cover. The case cover is movably hinged with a rear side wall of the case body, a locking mechanism is arranged on the front side wall of the case body, an elastic sealing ring is arranged between the case body and the case cover, the shape of the elastic sealing ring is matched with the shape of the case cover and the shape of the case body, a protective gas inlet and an air outlet which are communicated with an inner cavity of the case body are arranged on a side wall of the case body, and a protective gas concentration indicator gauge is arranged on the case cover and is communicated with the inner cavity of the case body. Protective gas is filled into the relatively closed protection case, so that the content of oxygen in the protection case i