Abstract: Rocky desertification is one of the most serious problems on economic development,eco-system restoration or restoration in West China.Compared with conception of desert,desertification and sandy desertification,and based on the analysis of the connotation,its formed reason,characters,regions and bedrock about rocky desertification,the authors considered that rock desertification belonged to desertification category and was the results of both human disturbance and nature background action.The rock desertification means a land degradation process that happens at karst environment with high bare bedrock rate or block accumulation in South China wet areas,which’s similar to desert scenes,owing to human disturbance,vegetation degradation even has disappeared,and water and soil erosion,and land productivity have declined.