Abstract: The western part is the key area of the eco-environmental protection and eco-safety in the whole country. Therefore, the eco-conservation in the west should highly emphasize the coordination of environmental protection and social development. The study was conducted to evaluate the coordination of eco-conservation and eco-construction, with social factors and ecological factors in a typical fragile erosion watershed. The social factors include the net income per peasant, Engel's coefficient, basic farmland per peasant, the percent of compulsory education, the degree of control soil and water erosion, and the percent of product value of secondary and tertiary industry. The ecological factors include vegetation coverage rate, soil organic matter and grain production potential. The results showed that the ecological factors and social factors hold the close relation. The environment restoration is conducive to economic development and social progress, and viceversa. The stability of watershed ecosystem and social development complement each other. And nature policy and tactics take important place in ecological restoration guide.

Key words: erosion environment, ecology restoration, nature and society eco-system, synergistic effect