The effects of some physical and chemical properties of soil on the electrode potential of steel in soils were studied. Results demonstrate that the soil moisture, soil compactness, soil salts and soil pH affect the electrode potential of steel in soils apparently. Under unsaturated condition the electrode potential of seeel in soils went down as the soil moistura increased, At tlae game level of soil moisture;negative correlation was observed between the electrode pctential and the bulk density which is an index of soil compactness. Increasing in salt concentration caused a shift of elecstrode: potential to the positive direction. Concerning the effect of soil pH three regions could be divided. In the region with a pH from 4.5 to 8.0 the influence was inappreciable. In the region with a pH from 2.0 to 4.5 and from 8.0 to 9.7 ,the electrode potential of steel was negatively correlated with soil pH, and the correlation coefficients equalled -0.953 and -0.982 respectively.