Abstract:Historical earthquakes were one of main dynamic factors for river sediment yield in Chuanjiang catchment

and Wenchuan earthquake in 2008 will further affect its soil erosion

and the trend of river sediment and fluvial processes.Wenchuan earthquake is the largest earthquake in Longmen Mountain area as recorded in the historic documents. The earthquake has changed erosion condition and resources of sediment owing to abundant incompact mass induced dilapidations

landslips

debris flows and barrier lakes. The earthquake has damaged erosion control instructures developed in recent 20 years

and cause more serious erosion. Advances of relative science and technology studies were summarized

which included the relationships between earthquake and catchment sediment yield；sediment amount of rivers in earthquake area；Effects of earthquake to fluvial processes of Chuanjiang water system; River restoration techniques to secondary disasters of earthquakes. It was suggested that further studies are especially required

including strengthen inter disciplines studies in areas of hydraulic engineering

geo science

and ecologic and environmental science to explore theory and key techniques of river restoration after earthquake secondary disasters.