Abstract: With the rapid development of basic communication construction in China, basic road construction is steadily increasing. The miles of roads increase and the grade of roads goes higher. In order to raise transport speed and efficiency, the line selection and road construction gradually extend from plain areas to hilly and mountainous areas, and consequently the problem of slope disasters is increasing. A brief introduction of roadbed diseases in Huangnan district of Qinghai Province is given. In a case study, the distribution of disease area, characteristics of deformation, causes of diseases, scale of diseases, tendency of disease development, degree of dangerousness and hazard extent are analyzed and studied. After a comprehensive analysis of the causes of deformation, the corresponding control measures are presented and are proved to be effective.