Method and device for judging stray current corrosion of buried gas pipeline under non-cathode protection

The invention provides a method and device for judging the stray current corrosion of a buried gas pipeline under non-cathode protection. The method comprises the steps that: evaluation index parameters of the buried gas pipeline are obtained, wherein the evaluation index parameters at least comprise a pipe-to-ground potential, a pipe-to-ground potential forward offset and surrounding soil resistivity; the distribution range of the pipe-to-ground potential and the ratio of the pipe-to-ground potential forward offset to the soil resistivity are calculated, and a preliminary evaluation result is provided according to a preset range, wherein the preliminary evaluation result comprises a first preliminary stray current corrosion risk grade obtained according to the distribution range of the pipe-to-ground potential; a second preliminary stray current corrosion risk grade is obtained according to the ratio of the pipe-to-ground potential forward offset to the soil resistivity; judgment is performed according to th