Studying the sources and existential forms of heavy elements is conductive to understand the regional migration and transformation laws of heavy metals. In order to do so, various environmental medias were collected surrounding the Dabaoshan Mine in China. We measure Zn isotope radio to trace the sources of the metals. The δ⁶⁶Zn/⁶⁴Zn values are heavy in ore, suspended sediment and surface water (from 0.28 to 0.3‰), whereas the paddy topsoil and fly ash have lighter δ⁶⁶Zn/⁶⁴Zn isotope ratios (from -0.26 to -0.17‰). Meanwhile, we also measured the Zn isotope radio of a paddy soil profile, which shows that the isotope radio of plow pan layer (0.26‰) is obviously heavier than the plough layer (-0.06‰). This suggests that Zn pollution in the paddy soils was mainly caused by the deposition of fly ash during anthropogenic activities (mining and refining) and irrigation water from surface water. Besides, fly ash make a greater contribution to the plough layer than the plow pan layer. On the contrary, the irrigation is the main source of the Zn in the plow pan layer. Selective sequential extraction method was used to distinguish the content of different fractions of heavy metal. The results show that Zn mainly associated with reducible Fe-Mn oxides (12.0%-68.7%), followed by exchangeable (1.1%-50.0%). X-Ray Powder Diffraction (XRD) and ⁵⁷Fe Mössbauer spectrum reveal that the mainly Fe-Mn oxides in the paddy soils are goethite and amorphous Fe oxide, which easily adsorb Zn²⁺ ion. Therefore, adsorption maybe the main way which heavy metal Zn bond to the Fe oxide in our study area. Our research provides scientific basis for developing the soil pollution control and remediation strategies in mining areas.