Fire has been used as a management tool since ancient times. It causes important changes to physicochemical properties of soil and in this respect fire intensity plays a significant role. This study was conducted to investigate the effect of different fire intensities caused by three different fuel levels (500, 1000 and 2000 g/m 2 ), two pasture species (Astragalus adscendens and Astragalus gossypinus) on selected physical, chemical, biological and hydraulic properties on two rangeland soils with different textures (loamy -sand and sandy -loam) under the controlled situatiohy;. Soil samples were collected from a 0-9 cm layer of two rangeland soils by randomized method with four replicates, using trays with dimensions of 20×30 cm and a height of 9 cm . After performing fire, soil samples were collected by cylinders with volume of 100 cm 3 from the center part of each tray to measure the bulk density, water repellency, saturated hydraulic conductivity and soil water characteristics curve. Furthermore, some soil samples were collected from 2 cm of surface soil trays for measuring some physical, chemical and biological properties of soil. Results indicated that the surface temperature of the soil increased by increasing the fire intensity and this depends on the types of plants residues to be burned. For this reason, the residue of Astragalus gossypinus produces more heat . By increasing the fire intensity, a significant increment in the amounts of pH, electrical conductivity, mean weight diameter, soil-water contact angle, total nitrogen, available potassium, available phosphorus and soluble sodium compared to the control samples (unburned ones) was observed. The types of the soil and burned plant residues have an important role on increasing some of these properties. The interaction between treatments and species resulted in significant differences in some parameters. As soil organic matter content in the 2000 g/m 2 fuel level of Astragalus adscendens was significantly greater than that of the control (from 2.15% in control to 2.66% in 2000 g/m 2 treatment), while in the other fuel levels of both species, the soil's organic matter demonstrates no significant difference with the control. Increment of total nitrogen and decrement of C/N ratio which are related to high fire intensities caused increasing the soil's basic respiration. For the water repellency index, when 2000 g/m 2 of Astragalus gossypinus burned, a lot of heat was produced so residues were burned completely and changed to the ash form which has a high water absorption. Increment of fire intensity caused an increase in the soil aggregates stability and soil hydraulic conductivity. This is due to the accumulation of water repellent materials on aggregates which blocked water movements and infiltration. This study showed that based on soil and plant type and amount of covering fire caused different influences, thus prior to using it as a management tool, all these factors should be considered. Keywords: Fire intensity, Soil water repellency, Microbial respiration, Soil water characteristics curve, Soil hydraulic conductivity, Astragalus adscendense, Astragalus gossypinus