The invention discloses a recognition method for on-site interference signals in a converter station overhaul workshop in the field of converter station partial discharge detection. The method is an interference signals three-stage separation and recognition method. Identical partial discharge detection devices are installed at two different positions outside and inside the overhaul workshop before an experiment, and interference signals inside and outside the overhaul workshop are measured; separation of the inference signals inside the overhaul workshop is realized through the interference signals three-stage separation technology, the separate interference signals are converted into a characteristic spectrum, the interference signal characteristic spectrum is compared with an interference signal sample database based on a similarity calculation method, and furthermore type recognition of the on-site interference signals of the converter station overhaul workshop is realized. The recognition method for on-site interference signals in the converter station overhaul workshop lays the foundation for anti-interference measures of subsequent on-site interference signals.