The project of Research and Integrated Demonstration of Ecological Amelioration Techniques of Saline-sodic Land in northeast China(2016YFC0501200)is sponsored by the National Key Research and Development Initiative, Ministry of Science and Technology of China. Aiming at issues such as deteriorated ecological environment, limited regional ecological restoration and low economic development of saline-sodic land in northeast China, this project tries to investigate the formation and stress mechanisms of soil salinity and sodicity, develop key amelioration techniques through microorganism, plant, soil amendment and agricultural engineering, integrate and demonstrate these ecological amelioration techniques on the county basis in typical distribution regions of saline-sodic land in northeast China. The ecological management model for saline-sodic land will be established, leading the saline-sodic land management to an economic, ecological and social beneficial cycle.