This book, "Ground Improvement Using Geopolymerization Technique," explores sustainable and innovative solutions for soil stabilization, focusing on black cotton soil. Rapid urbanization and industrial growth have heightened the demand for geotechnical solutions that are effective and environmentally sustainable. Geopolymerization, a groundbreaking technique, addresses traditional limitations by utilizing industrial byproducts and eco-friendly materials, ensuring enhanced soil strength, reduced environmental impact, and cost-effectiveness. The report examines its feasibility and long-term benefits, presenting a detailed study of its application in problematic soils. Organized into eight chapters, it begins with soil mechanics and stabilization fundamentals, followed by literature survey, problem statement, methodology, and experimental results. This collaborative effort of students, researchers, and faculty at Marwadi University serves as a guide for civil engineers seeking sustainable solutions. Our heartfelt gratitude to Prof. Parth Lakhani for his guidance and to Marwadi University for supporting this work.