The invention discloses a market partition method and device based on node electricity prices. The method includes: S1, obtaining electricity price data in a preset period in a target area to generate a data set; S2, obtaining a cluster center matrix and a random matrix, and performing random The matrix is initialized and normalized to generate a membership matrix, and the number of iterations is set to 1; S3, judge whether the current number of iterations is less than the preset threshold, if not, S5, update the clustering center matrix, according to the updated clustering The center matrix and the data set update the membership matrix, execute S4; S4, judge whether the updated membership matrix meets the convergence condition, if not, add 1 to the number of iterations, execute S3, and S5 if it is satisfied; S5, output the updated clustering center matrix and the updated membership matrix, each node is classified according to the updated membership matrix, and the target area is partitioned to generate a partition result. This method can reasonably partition multiple regions.