The utilization of natural black cotton (BC) soil in civil engineering applications is often hindered by its inherent characteristics such as swelling and shrinkage. In combating the adverse impacts of shrinkage, traditional materials like lime, cement, and fly ash have been conventionally employed as soil stabilizers. However, recent investigations into soil enhancement have shifted focus toward bio-inspired materials like biopolymers primarily due to their reduced environmental footprint. This study aims to enhance the properties of black cotton soil by mixing different percentages of Xanthan Gum (XG), biopolymer, and Poly Propylene Fiber (PPF). It is found that an upheavement of the soil was noted when the XG biopolymer is used to treat the black cotton soil, which has an expansive nature. At higher percentages of XG, curling of the soil was also observed along with the upheavement of soil. To overcome these limitations, in the current study, polypropylene fibers were added to the BC soil along with XG biopolymer to reduce the shrinkage. The experimental program involves a linear shrinkage test conducted on natural BC soil mixed with different percentages of xanthan biopolymer (0.5, 1, 1.5, and 2%) and polypropylene fiber (0.1, 0.2, 0.3, and 0.4%) to observe the linear shrinkage and the upheaval. The results of linear shrinkage tests revealed significant improvements in the reduction of upheavement of the black cotton soil with the addition of XG and PPF. From these tests, a reduction of 82% for the upheavement was observed when treated with 1% XG and 0.4% PPF, hence is found to be the optimum. The linear shrinkage of the soil is observed to decrease with increasing proportions of additives, apparently indicating the reduced volume change during drying.