Any civil engineering construction needs soil as its fundamental basis and the stability of these structures depends greatly on the quality of the underlying soils. Poorly engineered soils are difficult to build on and can cause serious issues for the structure that has been constructed on them. Treating the sub-grade soil is a very helpful procedure to prevent these issues. The process of stabilizing soil involves changing the characteristics of problematic soil using chemical or mechanical means in order to enhance its engineering property. Nowadays, using alternative materials with superior engineering quality has received a lot of attention. On the other hand, our nation has been producing more waste on a yearly basis. Reusing these wastes is one of the most alluring choices for managing them, and stabilizing soil with waste materials is particularly cost-effective because it supplies inexpensive and reusable materials. Effective use can be made of local resources. The purpose of this thesis is to examine the impact of adding various amounts of synthetic cloth waste ash and lime to black cotton soil found in Nefas Mewucha town. This study is done on the basis of experimental findings. The black cotton soil is treated by mixing lime and synthetic cloth waste ash by dry weight of soil with 2% and 4% of lime and 5%, 10% and 15% of synthetic cloth waste ash. Specific gravity, the Atterberg limit, free swell, compaction, the California bearing ratio (CBR), and unconfined compressive strength tests are performed in the laboratory and interpretations of test results are given based on different references. Finally, conclusions are made and recommendations for further studies are stated in detail. In addition, optimum amount of stabilizers is determined. Based on the laboratory tests, this study investigates that the combination of SCWA and Lime shows significant effect on engineering properties of the black cotton soil Key words: Black Cotton soil, Soil Stabilization, Synthetic cloth waste ash, Lime.