Aim of this research was to evaluate the efficiency of traditnal terraces and its impact on some of the characteristics of the soil in Hamun watershed.. To carry out this study, beside the assessment of volume and method of construction, samples of soil were collected from inside and outside of this research area. Then, we analyzed some factors such as pH, Ec, ... all of data analyzed by SPSS software. Assessment of structures sustainability has shown that terraces have been built according to scientific principles. The results of statistical analyses have indicated no significant changes on silt percentage. While, the amount of pH, EC, sedium, clay, calcium, … in terrace structure as statistically significant at the 0.01 level So, terraces have been created suitable micro-climate and causes improve of soil quality especially reduced salinity in this dry land area.