In this project we are working on, how to improve overall properties of soil. Soft clay and sandy silty soil are problematic soil from civil engineering construction point of view mainly in rigid pavement construction. To make them extra feasible to production purposes, several substances have been used. This research work gives a hybrid approach of sugarcane bagasse ash and polypropylene fibres to stabilize the clayey soil and sandy silty soil During experimentation, the rate of baggage ash varied in 15% and 20%. Likewise, the rate of polypropylene fiber was varied as 1% and 1.5% by weight of soil. We used 2 tests are conducted on soil samples, one is California Bearing Ratio and other is Modified proctor compaction test. The experimental results showing that the combination of sugarcane bagasse ash and polypropylene fibre increases strength at optimum content of 20% and 1% respectively by the weight of soil. The project results proved that the use of this hybrid approach has effectively enhanced the density of soil and CBR values also. The optimum content of SBA and PPF for both the soil are 20% and 1% respectively.