Abstract: High concentrations of organic pollutants persist in the soil and groundwater of coking plant sites, posing significant threats to human health and the surrounding ecosystem. To investigate the migration patterns and sources of characteristic pollutants in the soil and groundwater of coking plant sites, this study focuses on a coking plant site in Shanxi Province with a production history of over 30 years. By employing geostatistical visualization techniques and Pearson correlation analysis, we systematically examined the spatial distribution of characteristic pollutants in the soil and groundwater and explored the correlations between contaminants in different soil layers and groundwater. The results indicate that the primary pollutants in the soil are polycyclic aromatic hydrocarbons (PAHs), benzene, and petroleum hydrocarbons, with maximum concentrations of 268, 1 110, and 20 134 mg/kg, respectively. Contamination is predominantly concentrated in production, storage, and wastewater treatment areas. Pollutants are mainly distributed in surface soil and gravel layers, with maximum migration depths following the order: benzene (20 m) > PAHs (15 m) > petroleum hydrocarbons (13 m). Pollutant concentrations decrease with depth, and the silty clay layer exhibits a strong barrier effect against contaminant migration. In groundwater, the major pollutants are benzene, naphthalene, and phenanthrene, with maximum concentrations of 177, 7.85 mg/L, and 67.20 μg/L, respectively. A strong correlation exists between soil and groundwater contamination, with benzene, naphthalene, and phenanthrene in groundwater primarily originating from the migration of pollutants in the silty soil layer.