Mechanical resistance, infiltration and moisture content of soil are important parameters that affect plant composition in rangelands. At present study the effects of different livestock grazing intensities on plant composition, mechanical resistance, infiltration and moisture content of soil in reference, moderate grazing and heavily grazing areas located in Savojbolagh (Iran) rangeland was investigated during 2004-2005.Results showed spatially different mechanical resistance; mechanical resistance was the highest in heavily grazed area (1085.3kpa) and the lowest in reference area (717kpa) and it was higher for the depth of 15-30 Cm compared to 0-15 cm. There was a trend if increasing soil mechanical resistance as the grazing period increase. The average soil mechanical resistance increased from 850.2 Kpa in the beginning of the grazing period to 910.4 Kpa at the end of the grazing period. Soil moisture content followed a decreasing trend from reference area (control) to heaving grazed area while a reverse trend was observed in moisture content from 0-15 cm to 15-30 cm soil depth. There was significant difference in water infiltration rate among different grazing intensities the water infiltration rate decreased from reference to heavily grazed area which was 3.7, 3.2 and 2.3 mm/min for reference, moderately grazed and heavily grazed, respectively. As the grazing intensity increased the grasses, (43.7%) and bushes (51.8%) decreased while forbs increased (26.5%) in plant composition in heavily grazed area, compared to reference. The vegetative plant cover in heavily grazed area is comprised of invader forbs species such as Peganum harmala, Rosa persica, Ceratocarpus sp which clearly indicate the destructive effects of heavy grazing rangeland plant community and its productive ability. Among chemical characters organic matter, N, P, and K increase by the heavy grazing increasing. Acidity has high level in light grazing and EC has high level in heavy grazing.