The present invention provides a partial discharge positioning error correction method, a partial discharge positioning error correction system, a terminal, and a readable storage medium. The method includes the following steps that: a plurality of positioning coordinate values of a partial discharge source are obtained; and a clustering algorithm is adopted to perform jitter elimination processing on the positioning coordinate values so as to obtain the corrected positioning coordinate values of the partial discharge source. According to the calibration method, a plurality of times of measurement is performed on the same partial discharge source measurement point, a plurality of positioning data are recorded; the clustering algorithm is adopted to cluster the positioning data; and the cluster center of a cluster with the most elements in clusters is selected as the final positioning result of the partial discharge source; and the clustering algorithm is utilized, the jitter elimination processing of the measurement data can be well realized, and positioning accuracy is higher.