This book systematically introduces the current situation and development trend of soil erosion research, and systematically analyzes the factors that cause soil erosion, their action processes, and impact factors. The main contents include soil erosion types and soil erosion forms, hydraulic erosion, wind erosion, gravity erosion, mixed erosion, freeze-thaw erosion and glacier erosion, chemical erosion, soil erosion investigation and evaluation, soil erosion monitoring and prediction, soil erosion prevention and control, etc. It is hoped that through the publication of this book, readers will have a better understanding of soil erosion research and its importance, and it will be helpful for the demonstration and promotion of soil erosion research and prevention and control technology in China.