Abstract: Nanyang is the headwork location and important water source area in the middle line of South to North Water Diversion Project,is the core area and only joint part of headwork,trunk canal and reservior, and is the last ecological barriers and the most sensitive area to protect water resource. The canal water natural resources, economic resources were analyzed by constructing the function division of water and canal headwork ecological corridor partition.The focuses on the detailed analysis of construction are discussed.