Abstarct: According to various studies, the Gorgan mextamorphic complex that known as Gorgan schists, have not same lithology at its extension, and composed of various rocks that has been mextamorphed up to green schist facies. These complex rocks contain some trace elements especially heavy mextals, due to the basic igneous nature of important parts of it. In addition, another part of the parent rocks, consists of fine grain materials (especially shale) which have high ability to absorb heavy mextals. Also, according to the suitable climate and structural conditions, this complex have a high potential to weathering and the soil cover suspected to natural heavy mextal pollutants. In this study, to assessment the effect of Gorgan mextamorphic complex as an important natural resource, to release the heavy mextals, the concentrations of these elements in the in situ soil of southern Kordkoy and Gorgan were measured. For this, the chemical parameters of pH, EC, CEC, and heavy mextals concentrations in 35 samples of soils and rocks were determined. Also the lithology of some rock samples in thin sections was studied. For explanation of the changes in concentrations of As, Cd, Co, Cr, Cu, Mn, Mo, Pb, V and Fe, different standards and geochemical factors such as enriched factor, geo accumulation index, contamination factors and degree of contamination were used. To evaluation the correlation and paragenesis relationships, some statistical methods including Pearson correlation methods, cluster analysis and principal component analysis were done. The results shown that in the rocks samples As, Fe, V, Ni, Co, pb and Cu (with the mean equal of 2.22, 140093.33, 145.56, 115.83, 33.30, 20.77 and 80.90 in ppm, respectively) have a higher values than their mean crust. Also, in the soil samples Fe, V, Ni, Co and Cu, (with mean equal to 80502.86, 165.09, 56.56, 25.06 and 32.62 in ppm, respectively) have a higher values than those of the global average soils. baxsed on calculated Enrichment factor, Mo hasn’t Enrichment, As and Fe have a medium, and the other elements shows a little Enrichment. Iron, in the study area with the highest rate of geo accumulation (0.14), is uncontaminated to slightly contaminate. Iron, cobalt and vanadium have a moderate contamination factor. Finally, the study area with a modified contamination degree less than 1.5 is classified among the areas without contamination or very little contamination. baxsed on statistical analysis and analysis of heavy mextals soils covered the schist rocks (especially Tuskestan Valley) are the lowest and the soils over the basic igneous rocks (such as Naharkhoran Valley) have higher values of heavy mextals (Fe, Cr, Ni, V). In briefly, the results of this study show the effect of natural geogenic origin and the role of chemical composition of Gorgan mextamorphic complex to releasing the heavy mextal in the soils.