Xin’gan hydro-junction is the fifth junction on Ganzhou downstream of the Ganjiang River.It has the functions of navigation,electric power generation and other social benefits.The main structures include shiplock,water release gates,power house,fish passage and earth-filled dam.The riverway section,where the hydro-junction is located in,is straight.There are problems to be solved when the shiplock is placed on the right or left side of the river.The general layout of Xin’gan hydro-junction is discussed from aspects including topographical and geological condition of site,navigation conditions,reserved for the second-line shiplock,removing houses,project investment,etc.The upstream and downstream flow conditions are researched,including the power house,entrance of shiplock approaching channel and so on.The plan of “shiplock on the left and power house on the right” is recommended based on general demonstration.