Soil is very important in civil engineering constructions. The poor engineering properties of the local soils may present many difficulties for construction and therefore need to improve their engineering properties. Stabilization techniques can be used to improve the properties of soil. Soil stabilization improves various engineering properties e.g. bearing capacity, compressibility, strength, and various other properties of soil. In this study the impact of Sewage Sludge to improve the strength of soil The soil was stabilized with Sewage Sludge in the stepped concentration of 5%, 10%, 15%, 20%, 25% and 30% by dry weight of the soil individually. All stabilized soil samples were also cured for 96 hours for the CBR test in a fully saturated condition. The test results indicate that the addition of Sewage Sludge enhances the percentage of grain size distribution but with addition of Sewage Sludge till 20% the LL, PL, PI and decreases, while these parameters further increase in this limit beyond i.e. 20% to 30% of Sewage Sludge, but in the case of the optimal percentage of Sewage Sludge at which maximum CBR is achieved is selected, Specific gravity value of Natural Soil is 2.57, but a percentage of Sewage Sludge is increased, specific gravity value decreases gradually from 2.57 to 2.44 with increase in percentage of Sewage Sludge from 0 to 30% and value of raw soil is achieved as 1.85 gm/cc at OMC of 13.65%. It got increased to 1.93 gm/cc at OMC of 12.30 % when Sewage Sludge is increased from 0 to 20% is effective beyond also there is decreasing in MDD from 1.93 gm/cc at OMC of 12.30% to 1.89 gm/cc at OMC of 13.20% when Sewage Sludge is increased from 20 to 30%. The CBR value increases with the addition of Sewage Sludge till 20%, while it decreases beyond the limit 20% to 30% with the addition of Sewage Sludge. For both soaked and unsoaked conditions.